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Shut Down Gushing Leaks – SealBoss 15X Accelerator for Water Stop Foam

Shut Down Gushing Leaks
15X Accelerator for Water Stop Foam

SealBoss 15X Accelerator / Catalyst for Water Stop Foam

SealBoss ® 15X – Wide Range Accelerator

Shut Down Gushing Leaks
Hairline Crack Injection Leak-Seal
Slow Reaction
Fast Reaction
Semi Rigid Foam
Flexible Foam
Low Viscosity Foam

A Powerful Additive for the SealBoss Hydrophobic Injection Foam Line

By adding accelerator at varying ratios you can change reaction time and behavior of each foam to precisely suit your needs. With a little accelerator ‘magic’ you can shut down gushing leaks, seal hairline cracks and perform soil stabilization with the same product.

Shut Down Gushing Leaks: SealBoss 15X Accelerator and 1510 Water Stop Foam in Action

Water infiltration in concrete structures is one of the most persistent and destructive challenges in the construction and infrastructure repair industry. Whether it’s a gushing leak in a basement wall or an active water ingress point in a tunnel or foundation, fast, reliable solutions are crucial to protect structural integrity and reduce costly damage.

One of the most effective and versatile approaches to address these critical issues is the use of SealBoss 15X Accelerator in conjunction with SealBoss 1510 Water Stop Foam.

This combination empowers contractors and engineers to shut down gushing leaks quickly, safely, and permanently—even in high-pressure or wet environments.

The Problem: Gushing Leaks in Concrete

Gushing leaks often appear in concrete structures due to poor waterproofing, failed construction joints, cold joints, or natural aging. These leaks can carry hydrostatic pressure, often increasing during rainfall or seasonal groundwater shifts. Left untreated, they can cause:

Corrosion of steel reinforcement
Deterioration of concrete
Property damage and high repair costs
Mold and mildew growth

Because these leaks occur under pressure and may spread through hairline cracks or porous areas, traditional surface patching techniques often fail.

The Solution: Shut Down Gushing Leaks with Polyurethane Injection

Enter SealBoss’s polyurethane foam injection system, specifically the 1510 Water Stop Foam enhanced with 15X Accelerator. This powerful two-part solution is designed for rapid expansion and water-reactive sealing, forming a flexible, watertight foam barrier inside the structure itself—where the leak originates.

Meet the Products: 1510 Water Stop Foam and 15X Accelerator

SealBoss 1510 Water Stop Foam

This single-component, hydrophobic polyurethane grout is engineered to react quickly with water, expanding to create a semi-rigid, closed-cell foam that effectively fills voids and seals leaks. The foam:

Reacts in seconds when in contact with water
Expands to 30–40 times its original volume
Adheres to wet surfaces
Creates a long-lasting seal in cracks, joints, and porous concrete

Learn more: SealBoss 1510 Water Stop Foam

SealBoss 15X Accelerator

SealBoss 15X is a multi-range catalyst designed to control the reaction speed and expansion behavior of polyurethane foams like the 1510. This accelerator allows contractors to fine-tune foam performance based on environmental conditions and leak severity.

Use as little as 2% or as much as 20% by volume
Adjusts reaction speed from slow to ultra-fast
Works with 1510, 1570, and 1570 LV foam systems
Ideal for gushing leaks, hairline cracks, and soil stabilization

With 15X, users can slow down foam for deep penetration or speed it up to instantly shut down gushing leaks.

Learn more: SealBoss 15X Accelerator

How It Works: The Injection Process

Preparation
Identify the source of the leak. Drill angled holes targeting the crack or joint. Install mechanical injection packers.
Mixing
The SealBoss 1510 foam is catalyzed with a specific percentage of 15X Accelerator based on site conditions. For rapid leak sealing, 10–20% is often used.
Injection
Using a high-pressure pump (like the SealBoss P2002), the catalyzed resin is injected into the structure. When it encounters water, it reacts instantly—expanding and pushing water out while filling every crevice.
Curing
The foam cures rapidly, forming a permanent seal. Once the leak is stopped, packers are removed, and injection ports are patched.

Applications: Where to Use the SealBoss System

Below-grade foundation walls
Elevator pits
Parking garages
Tunnels and subways
Cold joints and construction joints
Dams, reservoirs, and tanks
Culverts and stormwater systems

Whether facing a slow leak or a gushing torrent of water, the SealBoss system provides a proven method to regain control and restore watertightness.

Real-World Performance

Contractors worldwide rely on the SealBoss 1510 and 15X system to manage demanding jobs. One of the key advantages is its flexibility. In colder climates or low-temperature substrates, a higher percentage of accelerator ensures the foam sets quickly. In situations where deeper penetration is needed, less accelerator allows the foam to travel before expanding.

With no need for excavation or external sealing, this internal injection method minimizes disruption while delivering powerful results.

Why Choose SealBoss?

SealBoss is ISO-Certified: Quality and consistency in every batch
Fast Support: Regional sales and technical teams available for on-site guidance
Versatility: Solutions for leak seal, soil stabilization, and crack repair
Training: On-demand training and technical support for contractors and engineers

Shut Down Gushing Leaks—The Right Way

Time is critical when you’re dealing with gushing leaks in a concrete structure. The longer water flows, the greater the risk of structural and environmental damage. The SealBoss 1510 and 15X Accelerator combo gives professionals the tools they need to act quickly and confidently.

With customizable reaction times, exceptional expansion, and field-proven durability, this system continues to be a go-to solution across a range of industries.

Get Expert Support Today

Need help selecting the right system for your leak repair project? Our team is here to assist. Whether you’re new to injection systems or looking to upgrade your leak sealing arsenal, SealBoss can provide the expertise, products, and equipment you need.

Contact us today: SealBoss Contact Page
View all leak sealing solutions: SealBoss Water Stop Products

Related Articles

15x accelerator spans all three of our base resins the 1510 Water Stop Foam, the 1570 Flexible Leak-Seal Foam and a 1570 LV Low Viscosity Crack Injection Foam. 15X Accelerator can be used in a wide range by volume in a percentage anywhere between 2% and 20%.

15x Accelerator - the little star that does a lot.

Inquire more about 151X Accelerator when you call us here at SealBoss. Your representative will be happy to help you out.

Chris Coderre

National Sales Manager

SealBoss ® 15X ACCELERATOR

Accelerator
Single Component Injection Foams

Accelerator For 1510/1570 PU Injection Foam.

Adjust foam gel-time and foam expansion from low foamer to high foamer depending application.

SealBoss ® 1510

Concrete Leak Sealing

Leak Sealing Foam Grout
Water Stop Foam Grout
Hydrophobic Injection Foam Grout

Our #1 Selling Polyurethane Injection Foam
Water Cut-Off Injection Grout
Semi-Flex Foam, Water-Activated chemical injection grout. Our most versatile product. Water activated hydrophobic polyurethane foam, expands up to 30-40 times.

Contact Your SealBoss ® Technician

Cold Joint Injection

Leaking Cold Joints Sealed

Cold Joints in Concrete Structures and the Polyurethane Polymer Solution

Introduction

Concrete is a versatile and strong material that plays a key role in modern construction, but it comes with certain challenges. One common issue is the formation of cold joints — visible lines or separations that occur when new concrete is poured against concrete that has already begun to set. These joints can compromise the structural integrity, creating weak points that are vulnerable to water infiltration, leaks, and long-term damage. Proper identification and repair of cold joints are essential for maintaining the durability and performance of any concrete structure.

Cold Joint Injection: Permanent Solutions for Concrete Leaks and Structural Integrity

Concrete is one of the most widely used building materials in the world due to its strength, versatility, and durability. However, like all materials, concrete has vulnerabilities. One of the most common and potentially damaging issues in concrete construction is the formation of cold joints. These unplanned discontinuities in concrete can significantly impact the long-term integrity of structures, particularly when they become pathways for water infiltration.

Fortunately, cold joint injection using advanced polyurethane polymers offers an effective and lasting solution. This article will explore what cold joints are, why they occur, the risks they pose, and how cold joint injection provides a reliable fix for both residential and commercial construction projects.

What are Cold Joints?

A cold joint forms when freshly poured concrete is placed next to or on top of concrete that has already started to set. Rather than bonding as one cohesive mass, the two layers remain separated by a visible and structural boundary. This boundary lacks proper adhesion and can act as a weak point in the structure.

Cold joints typically occur due to:

Delays in pouring concrete batches
Interruptions in concrete delivery or placement
Temperature variations that cause uneven curing
Scheduling issues or construction mistakes

The result is a distinct line or seam in the concrete that appears harmless at first but can lead to serious problems over time. Cold joints are particularly vulnerable to water infiltration, which can trigger internal corrosion of rebar, cause freeze-thaw damage, and reduce the overall life expectancy of the structure.

Cold Joint Injection: The Polyurethane Polymer Foam Solution

The most effective way to repair and seal cold joints is through a process called cold joint injection, using high-performance polyurethane injection resins. This method restores the integrity of the concrete joint and creates a watertight barrier that prevents future leaks.

Why Use Polyurethane for Cold Joint Injection?

Polyurethane injection resins are hydrophobic or hydrophilic foams that expand upon contact with moisture, filling voids and cracks with precision. When injected into a cold joint, the resin reacts with any water present, forming a flexible yet durable foam that bonds tightly to the surrounding concrete.

Benefits of polyurethane cold joint injection include:

Expands to fill cracks and voids – Ensures complete coverage and sealing
Forms a watertight barrier – Prevents water infiltration and leak recurrence
Flexible and durable – Adapts to slight movements and temperature changes
Non-invasive – No need for major demolition or reconstruction
Fast-curing – Rapid installation and reduced downtime

Step-by-Step Cold Joint Injection Process

The cold joint injection procedure typically involves the following steps:

Inspection and Assessment
The area is assessed to determine the severity of leaks, substrate condition, and appropriate injection points.
Drilling and Packer Installation
Holes are drilled at specific intervals along the cold joint. Mechanical injection packers are inserted to allow precise resin delivery under pressure.
Injection of Polyurethane Resin
Using a high-pressure injection pump, the polyurethane resin is injected into the packers. As it travels into the joint, the resin reacts with moisture, expanding and filling all voids and cracks.
Sealing and Curing
Once the injection is complete, the resin cures quickly, forming a flexible, watertight seal. Packers are then removed and holes patched.
Final Inspection
The site is checked to ensure the leak has been completely sealed and no further moisture intrusion occurs.

Real-World Application: SealBoss Cold Joint Injection in Kansas City

A recent project in Kansas City demonstrated the effectiveness of SealBoss’s cold joint injection system. A structure with both vertical and horizontal cold joints had developed active leaks due to a failed pre-existing waterproofing system.

SealBoss’s Regional Sales Manager provided on-site support and training during the injection process. The contractor drilled injection holes and installed ½” mechanical packers for a secure fit. Based on site conditions, both angled and direct drill placements were used.

The team injected SealBoss 1510 polyurethane resin using the P2002 high-pressure single-component injection pump. Due to the low substrate temperatures, the resin was catalyzed with 15% SealBoss 15X High Foaming Accelerator, which ensured rapid and effective expansion. The result? All active leaks were sealed successfully, and the structure’s cold joints were permanently reinforced.

Advantages of SealBoss Cold Joint Injection Systems

SealBoss offers industry-leading cold joint injection materials and equipment designed for professional contractors and infrastructure repair specialists. Key advantages include:

Complete waterproofing solutions for cold joints, cracks, and voids
High-performance resins that expand even in low temperatures
Specialized pumps and packers for efficient delivery
On-site technical support and training
Trusted by contractors worldwide in demanding applications

Whether repairing parking garages, basements, retaining walls, or tunnels, SealBoss systems deliver reliable, long-term protection against water intrusion and structural decay.

Cold Joint Injection: An Investment in Longevity

Repairing cold joints with polyurethane injection is not just a short-term fix—it is a long-term investment in structural performance. By addressing water infiltration early and effectively, property owners and contractors can prevent costly repairs, ensure code compliance, and extend the service life of critical structures.

For engineers, architects, and maintenance professionals, understanding the value of cold joint injection is key to preserving the quality of concrete infrastructure.

Contact SealBoss for Expert Cold Joint Solutions

SealBoss is a global leader in leak sealing, structural repair, and concrete protection technologies. If your project involves water leaks, cracks, or cold joints, contact our team for expert guidance, high-performance products, and technical support tailored to your needs.

SealBoss delivers on-site training and specialized technical assistance for tackling cold joint leaks, as well as other concrete structure issues.

Considering a Solution for Sealing Cold Joints During Construction?

Look no further! We not only offer systems specifically designed for sealing cold joints but also provide expert advice to prevent moisture issues right from the construction stage.

Materials and Tools Used

Related Articles

Learn More

Please don’t hesitate to call us at 714-662-4445 with any questions, or request to be contacted here, we look forward to helping you find a solution. On-site support from knowledgeable and experienced technical reps is available upon request.

Contact Your SealBoss ® Technician

Epoxy versus Polyurethane Crack Injection

Epoxy vs Polyurethane Injection

Crack Injection Superheroes

Epoxy Resins versus Polyurethane Resins
A Concrete Crack Injection Comparison

Epoxy versus Polyurethane Crack Injection

Epoxy and Polyurethane Resin Based Crack Repair Systems are the Superheroes of Concrete Crack Repair

When you need to repair a crack in a concrete structure — such as a foundation or wall — from the inside (negative side) of the structure, there are typically two injection techniques and corresponding product technologies that you need to consider — epoxy resin injection and polyurethane chemical grout injection.

Epoxy Versus Polyurethane Injection – How to Differentiate the two Injection Methods and Techniques

Epoxy injection is typically performed on dry substrates versus polyurethane injection that works very well on wet and actively leaking substrates.

Fully cured high quality epoxy offers outstanding compressive and tensile strength properties, making epoxy injection the preferred method where structural crack repair is desired.

Polyurethane injection is performed to seal active leaks, prevent moisture migration and to protect structures from corrosion and water related decay. Polyurethanes are designed to interact and expand in contact with moisture, making polyurethane injection technology superior in wet and actively leaking environments.

There is an injection solution to most concrete crack related problems. But, there is no one-size-fits-all solution.

In this article we compare some of the main characteristics of each type of crack injection, outlining their strengths and their recommended range of applications.

Injection Repair Conditions and Objectives

Does your crack impact the structure?
Do you need to restore structural strength to the structure?
Does the crack carry water?
Is the crack actively leaking?
Do you need to protect the structure from water ingress and water damages?

Comparison of the Characteristics of Epoxy and Polyurethane Polymers and Elastomers

Epoxies and polyurethane polymers are chemical resins with different reaction profiles and physical properties.

Epoxy is a strong adhesive or glue that does essentially not expand. While curing epoxy creates a strong bond with the concrete substrate and ultimately provides a repair of high compressive and tensile strength properties.

Epoxy is a two component system, one component is the epoxy resin and the second is the hardener. The components are blended in the static mixer of the injection pump applicator immediately before crack injection. Injection epoxies cure chemically within a specified time and harden further over days and weeks.

Polyurethane injection foam is primarily a water activated sealant or leak-seal grout with expanding properties during reaction. The cured product creates a compression seal of varying flexibility.

Polyurethane foam resin often utilizes an activator or accelerator. Resin and activator are mixed before they are injected. Polyurethane resins are also available in two component chemical cure variants. No moisture needed.

Polyurethanes are extremely versatile. Their chemical and physical properties vary to suit the needs of specific applications and jobsite conditions.

Polyurethane resins vary from rigid and strong to flexible, rubbery and soft elastomer compositions. The initial cure time for crack injection polyurethanes is generally 1 – 10 minutes and is influenced by accelerator usage, temperature and moisture availability.

Differences in The Epoxy and Polyurethane Crack Injection Processes

Epoxy crack injections are typically performed at lower injection pressures (20-200 psi) and with surface mounted ports.

Polyurethane crack injection is often performed at higher pressures to move the expanding foam through the cracks with special injection pumps and packers installed into drilled holes. The injected polyurethane is supposed to fill the crack through the entire thickness of the structure thereby preventing water from entering the crack.

Epoxy Crack Injection

Structural Repair – The tensile strength and compression strength of cured epoxy is typically much greater than the strength of concrete making epoxy a good choice for foundation wall structural crack repair. When tension is applied to a crack due to thermal cycling or other forces, the cured epoxy crack repair will not typically yield. Epoxy is typically rigid and not flexible.
Extended curing time allows the epoxy to penetrate the crack and fine fissures. SealBoss epoxies can be obtained in various viscosities to suit fine to wide cracks.
Dry Substrate Recommended – Epoxy typically has reduced adhesion to wet and saturated surfaces. A dry environment is desired for best results. Actively Leaking Cracks – Epoxy cannot be used for actively leaking cracks. Epoxy resin needs to be contained in a crack until cured sufficiently to achieve full strength.
Epoxy injection is performed through surface mounted ports. Moisture adversely affects the adhesive qualities of the anchoring epoxy used to glue the injection ports onto the crack. Without sufficient bond strength, the anchoring epoxy will not withstand the pressure of the injection.
SealBoss provides mechanical packers and special plastic packers to permit epoxy injection in adverse environments.

Polyurethane Crack Injection

Wet and Dry Applications – Polyurethane injection foams and resins can be used in adverse environments regardless of the condition of the crack and the weather. The crack can be fine or wide, actively leaking, full of mud and/or mineral deposits. (Whenever possible it is advised to flush and clean out a crack prior to injection)
Water Stop and Structure Preservation – The rapid curing of polyurethane is beneficial when stopping a gushing leak. The chemical expansion of the polyurethane foam (typically 2-40 times its original volume) makes polyurethane very effective at filling voids within the concrete. Polyurethane resins and foams play an important role in preserving concrete and rebar.
Not a Structural Repair – Polyurethanes do not provide structural repairs in concrete cracks.
High injection pressures are often required to move PU foam into fine cracks and fissures.
Mechanical packers require drill holes. No matter if the crack is actively leaking, under water or the concrete is deteriorated, mechanical packers are designed to work in adverse environments.

Product Characteristics

EPOXY (EP)

Rigid, very strong adhesive for structural repairs
Mainly for dry or damp environments, potentially reduced adhesion on wet substrates
Excellent to regain structural strength in torn structures: earthquake damage, extended stress damage, shrinkage cracks, corrosion
Not a water-stop material and does not tolerate extended movement – cracks can form next to repair
Two component formulation – Quick reaction time and cure
Viscosities from very low liquid to paste
Very resistant, long term solution
Available in bulk and cartridges
Recommended Products:
Resins: 4040, 4050
Paste/Putty: 4500 Epoxy Quick Seal
Cartridge System: 4000 Epoxy Cartridge System
SealBoss Surface Mounted Ports / Injection Packers

POLYURETHANE (PU)

Flexible to semi-flexible sealants with less structural strength compared to EP
Typically Hydro-Active – reacts with water forming foams (water-stop & leak-seal), gels and solid (non cellular) flexible or semi flexible sealants
Two Component PU Resins can be dry reactive. No water needed
Classified as hydrophobic (foams/resins) for crack injection, joints voids or hydrophilic (foams/gels) for curtain, bladder injection behind structures. Both groups are water activated for use in wet environments
Superior water-stop capabilities
Single or two component, accelerators common. Viscosities low to medium. Very resistant, long term solution
Recommended Products:
Foams: 1510, 1570, 1570 LV
Flexible resin: 1403, 1503 LV-Resin Line
Gel/Foam: Flexgel2
Cartridge System Available

Epoxy versus Polyurethane – Conclusion

In non structural water related repairs PU is generally the material of choice. This is true for most below grade repairs including basements, tunnels, parking garages and manholes. PU is a good void filler and is also used to stabilize dirt and lift structures.

EP is an excellent adhesive for structural repairs of stressed concrete substrates and deteriorated concrete structures.

TIP

When initiating concrete crack injection, it’s advisable to commence with an exploratory grouting or mock-up injection stage. This entails identifying a deep, distinctly defined, and potentially actively leaking crack for the initial injection. This preliminary step facilitates the estimation of required material quantity and necessary injection pressures.

The consumption of material should be closely monitored and measured, and the injection pressures should be accurately assessed.

This process helps us understand the conditions of the project and plan the remaining injection process effectively.

Accessories

EPOXY (EP)

Surface port injection at lower injection pressures 30 – 100 psi — Reason: Injection is typically done in dry environments and surface ports can be attached easily with epoxy adhesive.
Holes do not have to be drilled – there are exceptions
The crack surface between the ports has to be surface sealed to prevent leakage during injection
The viscosity of the epoxy resin stays low during the injection process, resulting in lower injection pressures
Recommended Products:
Surface ports, specialty ports

POLYURETHANE (PU)

Mechanical packer injection at higher pressures 50 – 3000 psi — Reason: PU injection is often performed in a wet environment where adhesives for surface ports cannot be used.
Mechanical packers are installed by drilling a hole into the structure which the packer fits snugly. The packer is tightened mechanically for high pressure injection
PU Foam immediately reacts with moisture in the crack increasing resistance of product flow, resulting in higher injection pressures
Recommended Products:
Complete line of packers: S-Type, R-Type, custom sizes, Hammer-in packers, specialty packers

Conclusion:

PU generally needs higher pressures and therefor the more sophisticated connectors / packers. There are many exceptions. For example curtain injection with PU gel into the space between structure and soil needs lower injection pressures but higher rates of material flow. The filling of larger voids and joint injection also uses lower pressures. PU injection through surface ports is not common, but high pressure epoxy injection through packers is seen more frequently. Reasons could be very thick concrete to be penetrated or damp / wet surface conditions.

Pumps

EPOXY (EP)

Two component equipment for most epoxy resins for ease of use and precise mixing
Epoxy is a very strong adhesive and may render equipment unusable if not cleaned thoroughly
EP is not very moisture sensitive and not moisture reactive. Epoxy does not expand during reaction – which results in lower injection pressures
Pneumatic or manual guns for cartridge systems / smaller jobs
Two component injection pumps achieve high injection pressures for large volume commercial injection projects. Pumps are pneumatic or electric
SealBoss Corp. supplies EP resins and paste also in cartridges
Recommended Products:
Hand held guns, electric pump P3003, pneumatic pump PA3000, 4000 Cartridge System

POLYURETHANE (PU)

Single component equipment for most water activated hydrophobic PU foams, accelerator to be added prior to pumping
Either single or two component equipment for true two component PU resins such as 1400 LV-Resin Line
Either single component or multi-ratio two component equipment for hydrophilic PU Gels based on the application and product.
Single component pumps include inexpensive hand held devices, hand pumps and electric pumps
Multi ratio devices can be manual, electric and pneumatic. SealBoss Corp. supplies PU in bulk and in containers as small as 1 gal units and in cartridges
Recommended Products:
Hand held guns, manual pumps, electric pumps, Signature Line Pumps

Choose Your Pump:

No matter if you are faced with a minor basement leak or a major tunnel gusher of large hydrostatic pressure , we have you covered. You need to have the right tools at hand to achieve the results. SealBoss infrastructure repair pumps provide you with tried and true concrete solutions.

Final Thoughts:

Over the years, injection technology has evolved, becoming both sophisticated and intricate. At SealBoss, we pride ourselves on offering a diverse range of products, pumps, and accessories tailored to meet the ever-growing needs of injection applications.

Our commitment extends beyond just providing products; we offer comprehensive technical support to ensure you find the perfect product-equipment synergy for your project’s success. We invite you to leverage our expertise and training resources. Remember, we are only a phone call away, eager to assist and guide you.

SealBoss ® EPOXY

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SealBoss ® POLYURETHANE

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Tunnel Water Stop Injection Leak Repair

Tunnel
Water Stop
Injection
Leak Repair

Leak Sealing
Systems

Tunnel Water Stop Injection Leak Repair with Polymer Grout Injection

Introduction:

Tackling Water Leakage in Tunnels: Challenges and Solutions

Water intrusion is a persistent challenge in tunnel infrastructure, affecting safety, durability, and operational efficiency. This article explores the risks associated with water leaks in various tunnel types—utility, vehicle, subway, rail, and pedestrian tunnels—and presents advanced solutions for effective sealing and structural reinforcement.

A key focus is the use of Polymer Injection Grouts, particularly acrylate gels and polyurethane resins, which offer reliable waterproofing and long-term stability. We delve into the properties and applications of these materials, outlining a step-by-step approach to leak diagnosis, material selection, and injection techniques.

Additionally, the article highlights SealBoss’s specialized products designed for underground water ingress repair, emphasizing the critical role of proper training and equipment for successful application. Whether addressing minor seepage or severe structural leaks, this guide provides essential insights for ensuring tunnel integrity and longevity.

Tunnel Water Stop Injection Leak Repair Overview

Tunnels, essential to modern infrastructure, vary in design and function but share a common challenge—water intrusion. Below is an overview of the tunnel types most susceptible to leaks and the potential risks they face:

Utility Tunnels – These tunnels house essential systems such as electrical wiring, water pipes, and gas lines. Water infiltration can lead to pipe corrosion, electrical failures, and even hazardous gas leaks, compromising both safety and service reliability.
Vehicle Tunnels – Water seeping through tunnel walls or accumulating on road surfaces creates hazardous driving conditions. Pooled water can reduce tire traction, increasing the risk of skidding, accidents, and severe traffic disruptions.
Subway Tunnels – Built beneath densely populated urban areas, subway tunnels are highly vulnerable to leaks from surrounding soil and aging infrastructure. Persistent water intrusion can disrupt train operations, cause service delays, and lead to costly maintenance and repairs.
Rail Tunnels – Water intrusion in rail tunnels poses significant risks, particularly to electrical components and track stability. Excess moisture can weaken the track bed, cause rail misalignment, and in extreme cases, contribute to derailments.
Pedestrian Tunnels – Water leaks in pedestrian tunnels create slippery surfaces, increasing the risk of slips and falls. Persistent dampness also encourages mold and bacteria growth, leading to poor air quality and potential health hazards.

Waterproofing and leak repair solutions are essential to maintaining tunnel safety, functionality, and longevity. Addressing water intrusion early can prevent costly damage and serious operational disruptions.

How to stop leaks of high hydrostatic pressures with Injection Grouts

Water ingress can cause immediate damages as well as lead to increased project costs and may lead to many other issues down the line.

Water ingress poses both immediate and long-term challenges, driving up project costs and leading to structural deterioration if left unaddressed.

Leaks through cracks, joints, and voids can be effectively sealed using advanced injection systems that employ cost-efficient and highly reliable chemical grouts, such as multi-component acrylate gels and single-component polyurethane resins.

When properly engineered, resin injection systems do more than just stop leaks—they also stabilize surrounding soil by transforming loose sands into a firm, sandstone-like consistency and consolidating gravel into a bonded, load-bearing structure. This not only enhances the durability of the tunnel but also improves its overall resilience against future water intrusion.

Example: SealBoss Acrylates Used to Seal Leaks in Tunnel

What are Acrylate Gels?

Acrylate gels, also known as acrylic gels, are highly flexible, ultra-low viscosity, hydrophilic sealing agents designed for non-structural injections. With a consistency similar to water, they effectively penetrate cracks, joints, and voids, making them ideal for grid, curtain, and bladder injection applications, as well as use in injection tube sealing systems.

Thanks to their exceptionally low viscosity and surface tension, polyacrylate gels offer superior penetration capabilities, allowing them to reach even the smallest fissures. Their adjustable gel time enables precise application, adapting to varying job site conditions such as temperature and injection distance.

When in contact with water, acrylic gels expand hydrophilically, creating a compression seal that prevents further leakage. This swelling behavior makes them an effective solution for waterproofing applications. Additionally, acrylate injection equipment can be easily cleaned with water, simplifying maintenance.

SealBoss provides a comprehensive range of high-performance products designed to control water ingress in underground mining operations, tunnels, and other commercial structures facing leakage challenges. Our solutions support waterproofing, soil consolidation, crack and joint repair, sealing, bonding, and cavity filling, ensuring durable and long-lasting protection.

Tunnel Water Stop Injection Leak Repair

How to Start Acrylate Injection Leak Sealing Injection Repairs

The principal steps to solve a problem are:

Diagnosis of the problem
Specification of injection methods
The correct choice of resin, pumps, packers and accessories
Training of installation personnel, a well trained and experienced team is paramount

Will I need more than One Product?

That depends on the conditions of the jobsite. Polyurethane and Acrylate injection systems offer a variety of solutions to problems found in geotechnical applications, in tunneling, waterproofing underground works and civil engineering in general. While there is no single resin that will suit all conditions, the correct resin must be used to achieve the best results possible and to meet the requirements of the specification.

If there are any questions about the various chemical grouts available, please do not hesitate to contact us, we are here to assist in any way we can. Always remember to work safely by wearing eye protection and gloves when handling any type of chemical systems.

Which products are shown in the videos?

Products used for Tunnel Water Stop Injection Leak Repair

Related Article

Flooded Tunnel Repair

Call Your SealBoss Technician

If you have any questions on crack injection water stop procedures or any injection related applications, please contact our team of qualified SealBoss representatives to schedule an on site consultation & full injection systems training. Call us at 714-662-4445.

SealBoss Leak Sealing Systems

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Injection

Contact Your SealBoss ® Technician

How to Seal Shrinkage Cracks

Shrinkage Cracks Sealed at Wastewater Treatment Plant

Introduction:

In wastewater treatment plants, maintaining the integrity of concrete structures is crucial for safe and efficient operations. Shrinkage cracks, especially around pipe penetrations, are common but problematic, leading to water infiltration, contamination risks, and structural deterioration. These cracks compromise the durability and safety of facilities, resulting in increased maintenance costs and potential environmental hazards.

Addressing shrinkage cracks requires specialized solutions that comply with stringent safety standards, particularly for structures in contact with potable water. SealBoss’s advanced polyurethane injection systems are designed to effectively seal these cracks, preventing water seepage and ensuring long-term structural integrity. By forming a closed-cell foam upon contact with water, these systems provide a durable barrier against leaks and contaminants.

This article explores the causes of shrinkage cracks, their implications for wastewater infrastructure, and innovative NSF-certified sealing methods that enhance durability and operational safety.

Understanding Shrinkage Cracks in Concrete

What are Shrinkage Cracks?

Shrinkage cracks are a natural occurrence in concrete structures that form during the curing and drying process. Concrete, a blend of cement, aggregate, and water, undergoes a volume reduction, or shrinkage, as the water used in the mix evaporates. This process of evaporation causes the concrete mass to shrink and contract.

Simultaneously, the internal reinforcements or sub-bases that the concrete is poured onto restrict this shrinkage. This restriction generates tensile stresses within the concrete. When these stresses exceed the concrete’s tensile strength, they give rise to drying and shrinkage-related cracks.

Shrinkage cracks, although often very small, are of significant concern in certain structures. Even though they typically don’t compromise the structural integrity of the concrete, they can create pathways for water and other corrosive materials. This is particularly crucial in structures like dams, where minor leaks can have substantial implications.

Moreover, it’s important to note that the shrinkage of concrete and the subsequent development of cracks is an irreversible process. Therefore, any resulting water leakage needs to be addressed with suitable methods such as concrete crack injection.

Effective Sealing of Shrinkage Cracks at a Wastewater Treatment Plant

Scope

At the wastewater treatment plant in Salina, Kansas, leaks were detected around pipe penetrations and shrinkage cracks in the concrete structure during testing. These leaks posed a challenge that needed to be resolved before installing pumps and pipes in the pump room.

Procedure

To address the issue, a Regional Technical Sales Manager from SealBoss conducted an on-site consultation, recommending the use of SealBoss 1510 Water Stop Foam. This hydrophobic polyurethane resin is designed to expand upon contact with water, forming a closed-cell foam that effectively seals shrinkage cracks and prevents water penetration.

The application involved a high-pressure injection process using the SealBoss P2002 injection system, paired with SealBoss 13-100 AL series injection packers. These packers are ribbed to withstand the high pressure of the injection, ensuring a reliable and durable seal. This approach provided a robust solution for sealing the leaks and protecting the integrity of the concrete structure.

Comprehensive Approach

The combination of on-site consultation, high-quality materials, and specialized equipment highlights SealBoss’s commitment to delivering effective and long-lasting solutions for infrastructure maintenance. The successful application at the Salina wastewater treatment plant is a testament to the effectiveness of SealBoss’s comprehensive approach to concrete repair and waterproofing.

Employed Products:

SealBoss 1510 superior penetration through hairline cracks

SealBoss ® 1510 NSF Approved Water Stop Foam

Shrinkage cracks around pipe penetrations are a common issue in wastewater treatment plants, leading to water seepage from tanks and basins. These leaks pose operational and maintenance challenges and require solutions that comply with strict safety and environmental standards.

SealBoss 1510 Water Stop Foam is a hydrophobic polyurethane resin specially designed to address these issues. Upon contact with water, it expands into a closed-cell, semi-flexible foam that effectively seals cracks and stops leaks. This product is NSF/ANSI/CAN 61 certified, making it safe for contact with drinking water. Its chemical-resistant properties and adjustable reaction times provide contractors with flexibility and long-term reliability, even in challenging environmental conditions.

The NSF/ANSI/CAN 61 certification ensures that SealBoss 1510 meets the highest safety standards for drinking water contact. This certification is vital for projects involving water treatment plants, containment structures, and other systems where water safety is a priority. It guarantees that the product will not leach harmful contaminants into the water supply, safeguarding public health and complying with regulatory requirements.

SealBoss is committed to providing safe and effective waterproofing solutions. With a history of serving the industry since 1988, SealBoss products are trusted by contractors, architects, and engineers worldwide. Our Full System Solutions include a comprehensive range of injection accessories, ensuring seamless integration and support throughout every stage of the injection process.

By choosing SealBoss®, you gain access to high-quality, certified materials and reliable technical support from a single, dependable source. This commitment to safety, durability, and efficiency makes SealBoss 1510 Water Stop Foam an essential choice for infrastructure repair and maintenance.

Related Super Low Viscosity SealBoss Chemical Injection Grouts:

SealBoss ® 1403 SLV Super Low Viscosity Polyurethane Resin for injection into very fine cracks.
SealBoss ® 2400 SealGel SLV Super Low Viscosity Acrylate Gel / Acrylic Gel for injection into very fine cracks.

SealBoss
Injection Brochure

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Cracks

Contact Your SealBoss ® Technician

Injection Packers

Injection Packers for High Pressure Crack Injection Applications Overview

Injection Packer Materials – Injection Packers bodies are constructed from various materials including steel, brass, aluminum, zinc, or plastic.
Dimensions – Injection Packers are available in many sizes, lenghts and diameters to meet the application demands, injection products, injection pressures, and injection volume and flow requirements.
Mechanical Packers – Injection Packers, specifically the mechanical injection packer types, short “Mechanical Packers”, are fitted with a compression rubber sleeve mechanism, to lock securely into the packer placement drilled hole.
High Injection Pressures – Mechanical Injection Packers, are designed to work in high pressure injection conditions from several hundred psi up to several thousand psi. (100 – 10,000 psi or 6 – 600 bar).
Injection Packer Application Procedures – Injection Packers are often placed in a staggered pattern along the crack in a 45 degree angle. This is known as the standard SealBoss 1 – 2 – 3 – 45 Degree Method. Other methods and packer placement techniques also apply depending on the requirements of the application.

Injection Packers are designed to safely and securely connect your Injection Equipment to the concrete substrate, in order to deliver the injection chemical resin – often under high injection pressures – to the area of repair.

Injection packers must be of suitable construction and sturdiness, as they have to withstand low and high injection pressures as needed, and allow for adequate flow of product. Their design must permit easy installation and removal, as needed – while being cost- effective.

SealBoss Packer Power: Where Cracks Meet Their Match!
We have the Right Injection Packer for You

Injection Packers Details Explained

Information About Injection Packers
Packer Materials & Types

Injection packers and ports are essential tools for successful grout and epoxy injection in construction and repair projects. These tools are generally categorized into two types: insertable mechanical injection packers and surface-mounted ports.

SealBoss offers a wide selection of injection packers made from steel, brass, aluminum, zinc, various metal alloys, and plastic.’

Each material and design caters to specific substrates, applications, and contractor preferences, ensuring a tailored solution for any injection scenario.

Mechanical Injection Packer Features
Premium mechanical packers incorporate a rubber sleeve with a threaded shaft. When tightened, the sleeve compresses to form a seal within the drilled hole. A soft, expandable rubber ensures optimal grip and supports high injection pressures.

SealBoss Steel Injection Packers are most robust, high-performance packers designed for high-pressure resin injection in demanding applications.
Known for their strength and durability, SealBoss steel packers are suited for high-pressure injections, icnluding polyurethane, epoxy, and acrylate/acrylic gels. Available in multiple designs, most include a rubber sleeve and a larger top washer for secure installation.

These packers are an efficient, industry standard setting, and effective solution for structural repair and waterproofing, trusted by professionals worldwide.

Steel Construction Injection Packers: Set the standard – built to withstand high injection pressures and provide a durable, reliable seal.
Interchangeable Fittings: Come with button head and standard and low pressure zerk fitting options, enhancing versatility for various injection systems.
Anti-Return Valve: Located in the fitting, it prevents resin backflow, maintaining the integrity of the injection.
Port-to-Port Resin Travel: Removeable valve allows for observation of resin movement, ensuring controlled application.
Wide Size Range: Suitable for various applications, from small repairs to large-scale projects.
Compatibility: Works with all injection resins, including low-pressure applications.

Brass, Aluminum, and Zinc Packers
These materials offer economical alternatives to steel with similar functionality. Although they have lower strength, some designs allow the shaft to be broken off after injection, leaving a flush surface—a benefit for certain projects.

SealBoss Aluminum Injection Packers are economical, lightweight options for standard resin injection tasks.

Modeled after the SealBoss S-Type steel, these aluminum packers offer a very budget-friendly solution for typical crack injection scenarios, ideal for professionals looking to reduce costs on routine jobs.

Aluminum Construction: Provides a secure fit and is lighter and more affordable to ship than steel alternatives.
Cost-Effective: The most economical option for crack injection, saving costs on large projects.
Anti-Return Valve: Located in the zerk fitting, preventing resin backflow during application.
Standard Application Use: Suitable for everyday injection needs and non-critical applications.

SealBoss Brass Injection Packers are durable and versatile packers designed for resin injection.

These economical alternatives to steel packers are widely used in construction for their built in zerk fittings, reliability and cost-effectiveness.

Available in a Wide Variety of Sizes, Thicknesses, and Lengths: Options range from compact to extended-length injection packers, designed to meet the most demanding jobsite requirements.
Monolithic Zerk Fitting:No separate zerk fitting ensures smooth installation procedure and secure attachment.
Anti-Return Valve in the Packer Base: Prevents resin backflow, even if the neck is unscrewed or broken off.
Defined Breaking Point: Allows clean removal after use.

SealBoss Standard Zinc Packers are strong, affordable, and reliable packers designed for standard grout injection.
Zinc injection packers are another choice for general injection applications, offering quick installation and efficiency in everyday crack repair and sealing tasks.

Bottom Anti-Return Valve: Enables head removal after grout injection, preventing backflow.
Packer Neck Hexagon: Easy tightening packer neck
Common Industry Size: Provides adequate surface seal area for a secure grip at an economical price.

SealBoss Plastic Buttonhead Injection Packers and Hammer-In Ports for large Volume Injection nad Fast Installation.

These plastic packers offer versatile options for resin grout injections, covering applications that metal-style injection packers may not accommodate.

The SealBoss Hammer-In or Bang-In packers require only a hammer to secure in place. These packers create a compression seal without a sleeve, making them ideal for quick installation. However, they are best suited for low-pressure injections due to a lower friction fit.

Buttonhead Packers: Feature a large anti-return valve and inner diameter for high-volume material flow, ideal for low-pressure applications like curtain injection and slab lifting.
Hammer-In Ports: Quickly installed without the need for tightening, providing a fast, economical alternative to mechanical packers in certain applications.
Wide Compatibility: Suitable for use with epoxy, grout, and various SealBoss injection systems, including manual, pneumatic, and cartridge injections.

Injection Packer Fitting Types

Packers often feature either a zerk or button head fitting for connection:

Zerk Fitting: Commonly used for medium to high-pressure applications, offering quick connection and disconnection.
Button Head Fitting: Suitable for high-volume applications, providing a superior connection with reduced leakage, especially beneficial for single-operator use.

Surface Ports

Surface-mounted epoxy injection ports are suitable for lower-pressure applications or when drilling isn’t feasible. They can be glued directly to the surface or placed within a drilled hole. Many have open designs for quick-release connectors and are equipped with caps to prevent backflow. Ports with zerk fittings are available for higher pressure needs, including specialized corner ports for 90-degree angles.

Find all SealBoss Injection Packers and Surface Ports here

Injection Packer Dimensions and Specifications

Diameter
A packer’s diameter affects injection pressure capacity and fit within drilled holes. Common sizes include 5/8” (16mm), 1/2” (13mm), 3/8” (10mm), and 1/4” (6mm). Larger diameters are generally more resistant to blow-outs and provide a stronger grip, especially for high-pressure and rock applications.

Length
Longer packers, ranging from 4″ to 6″, are ideal for deteriorated concrete or deep injections. They enable secure embedding within the substrate, minimizing the risk of spalling and bridging gaps in the structure.

Valve Placement

Top-Mounted Valves: Zerk and button-head valves allow for observing grout travel during injection. Button-head valves offer a stronger connection with less leakage.
Bottom-Mounted Valves: Positioned on the stem, these valves allow the packer’s head to be removed after injection, keeping the seal intact and facilitating patching.

Conclusion
The 1/2″ (13mm) diameter mechanical injection packer is often a reliable starting point for most projects. Steel packers are ideal for very high injection pressures, though economical considerations may favor alternatives like aluminum, brass, or zinc for a variation of scenarios including jobsite conditions and budget.

Larger diameter injection packer can reduce blow-out risks, while longer packers are recommended for angled drilling and degraded substrates.

High-flow applications at lower pressures may benefit from the 5/8″ button-head packers, while the 3/8″ Hammer-In packers could be suited to low-pressure work in high-quality concrete.

SealBoss offers a diverse range of packers and ports, including surface ports with zerk fittings for smaller epoxy and polyurethane jobs and injection screws for cold joint applications. Ensuring a secure fit and selecting the appropriate packer type is crucial for technician safety and successful injection results.

Injection Packers for Crack, Water Stop and Leak Sealing Injections

SealBoss injection packers connect the injection equipment (applicator and injection pump) with the structural substrate to serve as the port of entry – or filler neck – for a large variety of injection resins and chemical grouts into concrete mediums.

Our Packers are made from a various metals including steel, brass, zinc, aluminum / aluminium or plastic. Packers are typically equipped with either a zerk fitting or button head fitting for easy and secure connection to the applicator. The button head type offers the most secure connection in overhead, high pressure and high volume appplications.

Conditions of the jobsite, environment and material determine the type, material, and build of packer, in order to achieve the best injection results. SealBoss provides a very large selection of injection packers to meet all professional needs.

Injection Packers – Installation Types

Based on injection requirements and injection products to be used, we distinguish between borehole packers and surface mount packers, also known as surface ports.

Cylinder shaped, borehole type injection packers are typically used for high pressure injection with polyurethane bases, water stop and leak-seal resins and injection foams.

Borehole style packers work very well in wet and otherwise demanding environments, such as deteriorating concrete substrates.

We further differentiate between mechanical packers with a tighten-down and screw-in mechanism, and hammer-in technique packers.

The seal of the aforementioned packers is achieved by friction between the packer body in the drill hole and the surrounding substrate.

Surface mounted ports are mostly used for structural epoxy injection where a non-destructive injection process – no drill holes allowed procedure – is specified.

Surface mounted packers or surface ports are glued to the surface of the substrate and rely on the bond strength of the adhesive, such as SealBoss 4500 epoxy paste adhesive. Surface port placement is best performed on a dry substrate and can be difficult in wet environments with active water leaks.

Preparatory work

Step1 – Structure / Substrate / Product Analysis

Condition of structure, environment and climate
Chemical rout / resin specified
Injection pressures expected (high pressure vs low pressure)

Step 2 – Packer Choice

Select suitable injection packers.
Please consult with your SealBoss Technical Rep.

Installation

Installation procedures depend on the conditions found at the jobsite. SealBoss provides detailed information online and in printed publications. Please contact your technical rep.

The size of the drill holes equals the stated diameter of the mechanical packers and hammer-in packers; the borehole depth varies according to the conditions and requirements.

Drill holes are typically made at an angle of approx. 45° depending on the wall thickness and other conditions. All drill dust and debris must be removed from the boreholes.

Final work

Remove or knock-off the mechanical packers / hammer-in ports / surface packers as specified
Patch the drill holes with suitable mortar

Related Links

The SealBoss Packer Page

Click Here

Contact Your SealBoss ® Technician

Seawall Repair

Comprehensive Repair Systems
for Commercial and Residential Seawalls

Seawalls serve as guardians of our coastlines, protecting against the ocean’s force while shielding properties by bays, rivers, and lakes. Yet, their resilience is tested by the ceaseless tides and natural elements, leading to gradual wear over time.

Regular repair and maintenance are essential to keep seawalls in good working order, ensuring their longevity and continued effectiveness in safeguarding both natural and developed areas against erosion and flooding.

Regular repair and maintenance are essential to keep seawalls in good working order, ensuring their longevity and continued effectiveness in safeguarding both natural and developed areas against erosion and flooding.

SealBoss Seawall Repair Methods Introduction:
Seawall Failures and Effective Seawall Repair Strategies

Over the passage of time, even the sturdiest seawalls can exhibit cracks, becoming susceptible to water penetration. In certain scenarios, the very foundation of the seawall might shift due to the erosion of its supporting substrate. Proactively identifying and rectifying these concerns can stave off escalated damage, ensuring the seawall remains a steadfast defense against water and erosion.

Whether for private residences or commercial establishments, many seawalls are crafted with similar design principles.

Their upkeep and restoration can be effectively managed using hydro-active, hydrophobic polyurethane foams for leak-sealing and water-stopping, as well as two-component or dual-component polyurethane foams for void-filling, elevation, and support of foundations and bulkheads.

When it comes to repairing structural concrete damages and concrete spalls in seawalls and marine piles, epoxy injection resins and epoxy paste adhesives can be a reliable option.

These resins can provide long-lasting reinforcement to the affected area, helping to ensure that the seawall or pile can continue to withstand the stress and impact of waves and tides.

Additionally, the use of professional-grade equipment and accessories tailored to the specific conditions of each seawall repair is essential for ensuring both the quality and longevity of the restoration. This specialized equipment helps optimize the application of repair products, such as polyurethane foams and epoxy resins, ensuring they perform as intended in sealing leaks, filling voids, and stabilizing structures. By employing the right tools, contractors can address the unique challenges posed by each seawall’s environment, contributing to more effective, durable repairs that prevent future erosion, water ingress, and structural failure.

Understanding why seawall failure occurs and taking timely steps to prevent further damages is important to protect your land and any structures that may be impacted by ingress of water and shifting soils.

SealBoss Corp. has been providing concrete solutions and systems for seawall repair since 1988. With decades of experience, the company offers a range of proven methods designed to tackle various challenges, ensuring long-lasting protection and stability for both residential and commercial seawall structures. By combining high-quality products with professional expertise, SealBoss continues to be a trusted partner in seawall repair and maintenance.

Why Do Seawalls Fail?
Causes & Warning Signs of Seawall Failure

Poor Maintenance | Lack of Inspection to Detect Problems Early
Erosion, Washout, Sinkholes
Footing, Bulkhead Shift Due to Erosion
Cracks and Expanding Cracks in Seawall
Rust & Corroded Rebar Expansion
Drain Failure
Environmental Factors – Natural Disasters

Regular and Proactive Inspections and Maintenance: A Key Strategy to Prevent Seawall Damage

Executing frequent inspections and prompt maintenance are integral to extending the lifespan of your seawall. These preventative measures can save you from costly repairs in the long run by addressing potential issues before they escalate.

A significant issue you may encounter is the clogging of drain and weep holes. These are crucial components in the seawall’s design as they allow water accumulated behind the wall to drain. If clogged, water will build up, leading to added stress on the seawall and potential damage. This accumulation of water can soften and loosen the soil behind the wall, which could increase pressure and raise the water table. Such conditions might result in the formation of cracks in the seawall structure, thus creating new, unintended pathways for water flow and consequently causing soil erosion.

Understanding the Implications of Soil Erosion due to Accumulated Damages

Water migration through these new pathways, cracks, voids, and defects can lead to a gradual weakening of the seawall. As the wall undergoes consistent damage and erosion, its foundation may lose support and shift. This can be particularly problematic because soil erosion has the potential to create sinkholes. These sinkholes can further collect water, accelerating the decay process and potentially leading to the seawall’s failure.

Hence, regular inspection and maintenance can help identify early signs of soil erosion and structural damages, thereby preventing severe consequences and ensuring the longevity of your seawall.

Seawall, Bulkhead, Revetment Repairs:
Advanced Polymer Systems and Specialized Equipment Solutions

Seawall Insights: Lifespan, Costs, and Innovative Repairs

Seawalls are meticulously designed for specific functions. However, many seawalls have a lifespan of just 25 – 50 years, and possibly less without inspections and maintenance.

Depending on the location, the cost of replacing a deteriorating seawall can range from $200 to in excess of $1000 per foot, prompting many homeowners to seek alternative solutions.

Fortunately, available repair solutions allow for addressing signs of seawall distress early on. The use of polyurethane grouts and epoxy resins can effectively seal leaks, fill voids, stabilize surrounding soils, and provide structural repairs where needed.

Seawall Repair Techniques Used For Seawall Restoration

Seawall repair procedures and techniques include polyurethane crack injection, soil stabilization injection grouting, permeation grouting, structural support and void fill grouting, as well as structural epoxy injection.

By reinforcing, sealing, and repairing seawalls, you can not only maintain their structural integrity but also considerably prolong their lifespan.

SealBoss Offers a Suite of Advanced Seawall Repair Systems and Products tailored for Seawall Rehabilitation

We offer specialized products and systems designed to stop water intrusion, seal gaps, mend leaks, fix cracks structurally, fortify unstable soil, and support compromised foundations for comprehensive seawall and bulkhead repair.

Prolong the lifespan of your seawall for many more years, all at a cost significantly lower than a complete replacement.

Polyurethane Foam Injection Technology

Delivering unmatched robust performance in challenging and wet conditions, polyurethane injection grouting presents a comprehensive array of repair solutions, featuring a variety of grouts and application methods.

Depending on the specific need, these methods can be combined for optimal results. Among the prominent techniques are:

Crack Injection and Curtain Grouting: These methods are used to stop water flow, seal cracks and crevices, prevent general water ingress and further deterioration and erosion
Soil Stabilization and Permeation Grouting: By solidifying the soil around the seawall, this technique ensures a stable foundation, reducing the risk of shifts or collapses. This process involves injecting grout into the soil to reduce its permeability, thereby preventing erosion and water infiltration
Structural Support and Void Fill Grouting: Voids or gaps behind or beneath the seawall can compromise its stability. This technique fills these voids, ensuring the seawall remains firm and upright.

Epoxy Resin Seawall Repair Technology

Specially designed to provide structural strength repairs to concrete cracks and spalling damages, epoxy injection provides sustained structural reinforcement to the vulnerable portions of seawalls, concrete dock posts, and other maritime structures that manifest signs of gradual deterioration. Primarily utilized above the water table.

Epoxy Patching and Injection: Filling, sealing of crack and voids, and providing structural adhesive strength to concrete structures.

Seawall Repair Equipment

Adequate product delivery and application equipment is vital, as it ensures repair materials are
accurately and efficiently injected and delivered at the necessary pressures, achieving the desired penetration and comprehensive repair.

Injection Pumps, deliver repair materials like polyurethane grouts and epoxy resins to damaged areas
Injection Packers, connect the pump to the seawall and ensure material delivery
Injection Soil Lances and Needles, treat and stabilize the surrounding soil
Seal Oakum, to assist in sealing larger cracks, voids, and stop high velocity water flow

By leveraging these products and techniques, one can ensure that seawalls remain robust and resilient against the challenges posed by nature and time.

When to Use Polyurethane Foam Grout for Seawall Injection Repairs

Enter polyurethane foams, a game-changer in seawall repair. These lightweight injection resins offer a multi-pronged solution: they seal leaks, fill voids, mix with soil to create a solid, impermeable mass, and support footings and foundations.

Understanding the Applications of Single Component Hydro Active Foams for Seawall Repair by Injection

SealBoss 1510 Polyurethane Foam
is a single component foam, it excels in sealing cracks and offers impressive soil penetration and stabilization properties. It is activated by an accelerator and is particularly effective for soil permeation and consolidation.
Used for crack injection to stop water flow, seal leaks and fill voids, curtain grouting to seal any gaps between structures and their surrounding substrates, and for soil permeation and stabilization, ensuring the firmness of the substrate, footing, and the entire structure – this versatile, single-component, accelerator controlled, hydrophobic polyurethane foam is activated upon contact with water.
During the reaction phase, SealBoss 1510 infiltrates deep into the cracks or surrounding soil. This permeation helps seal all voids and fissures, simultaneously stabilizing and anchoring any loose substrate. This feature makes it an ideal solution for maintaining structural integrity and preventing water damage.

Other SealBoss Hydroactive Foams, Resins, and Gels to Consider:

SealBoss 1570 and 1570LV flexible hydrophobic foams
SealBoss 1403 super low viscosity PU resin
SealBoss Flexgel hydrophilic gel
SealBoss 2400 ultra low viscosity acrylate gel

Filling Seawall Foundation Voids – Strengthening Seawall Foundations

Understanding the Applications of Plural Component / Two Component Foams for Seawall Repairs

SealBoss 1640
is a two component, structural foam, best suited for filling voids behind and underneath structures, especially in larger aggregate environments.This robust foam offers formidable support, playing a pivotal role in strengthening the seawall’s stability. Yet, it is vital to recognize its constraints: while adept at gap-filling, it is less suited for permeating soil.
SealBoss 1640 can exert significant pressure and lifting forces. Thus, a thorough understanding of your seawall’s specific conditions and needs is imperative before deploying this product. When applied within its recommended parameters, SealBoss 1640 can be potent ally in fortifying seawalls, enhancing their durability and prolonging their operational life.

Other SealBoss Two Component Foam to Consider:

SealBoss 1625

When to Use Epoxy Crack Injection for Seawall Repairs

Resilient epoxy injection resins are used for structural crack repairs in seawalls and marine piles. Cracks are often present in areas that are above the water table and should be preferably dry at the time of application.

Understanding the Applications of Epoxy Resins and Epoxy Paste for Structural Seawall Repairs

SealBoss 4040
Low Viscosity Epoxy Injection Resin is our standard resin, suitable for most concrete restoration projects. It’s an outstanding choice for structural repairs on seawalls, concrete dock posts, and various harbor infrastructure showing signs of deterioration, cracking, or spalling. This versatile epoxy resin proficiently seals and repairs cracks, significantly enhancing the structural integrity and durability of concrete marine installations.
SealBoss 4050 SLV
Super Low Viscosity Epoxy Injection Resin is our specialized solution for concrete restoration where deep penetration is required, particularly in extremely fine cracks. Similar to our standard 4040 resin, SealBoss 4050 is ideal for seawalls, concrete dock posts, and other harbor infrastructure showing signs of deterioration, cracking, or spalling. Its super low viscosity allows it to penetrate the smallest cracks effectively, providing a durable seal that reinforces the structural integrity of concrete marine installations.

SealBoss 4500
is our fast-setting, high-modulus structural epoxy paste adhesive, specifically suited for seawall repairs and other concrete restoration projects. This versatile paste is ideal for surface sealing of concrete cracks and securing surface-mount ports before epoxy injection.
For smaller jobs, we also offer epoxy resins and other professional-grade products in convenient dual cartridges, providing an efficient alternative to bulk materials while maintaining the same quality and reliability.

What SealBoss Equipment Do I Need For Seawall Repairs?

For seawall repairs, we recommend the SealBoss Injection Packer and Surface Port System for targeted crack repair. These tools allow for precise resin injection, ensuring proper sealing and structural integrity. For permeation grouting and soil stabilization, our Injection Lances and Grout Injection Needles are ideal for reinforcing weak soils and stabilizing the surrounding area.

SealBoss also offers a wide range of injection pumps, from manual to high-pressure models, designed to handle various resin types and viscosities, ensuring accurate and efficient material application. This combination of equipment delivers reliable, long-term results for seawall repair projects.

SealBoss System Equipment and Accessories for Seawall Repairs

Injection Pumps:
SealBoss® offers a wide range of professional-grade, proven pumps tailored to meet your seawall repair injection needs. Selecting the right pump depends on several factors, including the size of the job, the components of the product, and the specific material properties.
SealBoss provides a variety of pump designs, including piston and membrane models, available with electric, pneumatic, drill-operated, or hand-powered options. Whether you need a pump for single-component, two-component, or plural-component applications, SealBoss has the ideal solution for your project.

Injection Packers:
We offer a broad selection of packer materials, diameters, lengths, as well as various ball and valve designs, ensuring the perfect fit for your specific seawall repair needs. Packers are the essential link between the injection pump and the seawall, guaranteeing secure and efficient delivery of repair materials to the target area. Both mechanical injection packers and injection ports are vital for a successful injection process.
At SealBoss, we are dedicated to providing one of the most comprehensive and versatile selections of injection packers in the industry, delivering reliable solutions for projects of all sizes and complexities.

Injection Soil Lances and Grout Injection Needles:
Specifically engineered for soil injection, soil grout lances are designed to penetrate deep into the ground, ensuring the repair material reaches the necessary depth. Connected to a pump or pressurized system, the lance delivers the polymer solution directly to the targeted area. Once inserted into the ground at the desired depth, the polymer is injected. Both the pressure and flow rate can be adjusted according to the soil type and the project requirements, ensuring optimal stabilization and long-lasting results.
SealBoss Injection Needles are designed for specialized grouting applications, enabling precise product delivery into soil substrates through a small opening, as well as for use in the Oakum Soakum Injection Technique and more. These versatile needles are suitable for a wide range of grout types, including polyurethane (PU), epoxy (EP), polyacrylate, and silicate grouts, ensuring effective application across diverse projects.

Seal Oakum:
Soakable Oakum is specifically designed to absorb SealBoss Water Stop Foam products and injection grouts, ensuring they stay securely in place to create an effective barrier in larger openings with active water infiltration. As a carrier medium for hydro-active foam resins, Soakable Oakum is ideal for sealing leaks in wide gaps. It can help to slow down substantial water flow, giving the injection foam time to fully cure, resulting in a durable and watertight seal that protects against further leakage.

Podcast:
Seawall Repair Discussion and Valuable Information

Podcast with Seawall Repair Contractor

In this podcast, two industry professionals talk about grout injection and seawall repair with single and dual component polyurethanes. The procedures discussed cover general injection grouting procedures, including erosion control, permeation grouting and seawall support and footing stabilization.

SealBoss can connect you with experienced foundation and polymer injection specialists, trained in the SealBoss system, who specialize in seawall repairs and maintenance, using the full spectrum of SealBoss Systems. Reach out to a local contractor for structural stabilization, geotechnical soil injections, or leak sealing services, and lower your costs on seawall and bulkhead repairs.

Expert Interview Podcasts on Infrastructure Repair, Products, Methods, and more

Waterproofing Parking Structure Cracks

Waterproofing
Parking Structure Cracks

Acrylic
Gel
Injection

WATER – ESSENTIAL YET DESTRUCTIVE

Water is the foundation of life on Earth, yet it also possesses the power to erode, weaken, and destroy. Nowhere is this duality more evident than in the construction industry—particularly in the behavior of concrete.

Water is essential to concrete’s formation, enabling its chemical transformation from a fluid, workable mixture into a solid, durable structure. However, once cured, unwanted water infiltration can become a silent destroyer, corroding reinforcing steel and compromising structural integrity.

Over time, this deterioration can render concrete structures unsafe and unusable. In essence, water is both a creator and a threat—one of the simplest yet most powerful forces shaping our built environment.

This article explores how water intrusion impacts concrete structures—specifically in parking facilities—examining common vulnerabilities, potential consequences, and proven solutions to mitigate damage. By understanding these risks and applying effective waterproofing techniques, engineers and contractors can extend the lifespan of concrete structures and ensure long-term durability.

Waterproofing Parking Structure Cracks

At a parking structure in Burlingame, California, the shotcrete structure and mat slab were exhibiting signs of unwanted ingress from the water table outside of the building.

While evidence of cracking was not necessarily present, efflorescence on the interior surface of the walls told the tale that the migration of unwanted groundwater was presenting a problem.

The structure is referred to as an Automated Parking Structure where building tenants can retrieve their automobiles by entering a code at the entry point to the structure and have their vehicles essentially “delivered” to them once the internal workings of the structure retrieve the vehicle. It becomes obvious from this description of the project that water has no place in the intricate electronic systems that comprise this facility but more so on or near the vehicles that live in this structure. Something needed to be done and a certified specialized contractor was called in to get the water mitigation handled.

The construction of the concrete is something to note, particularly with respect to the steel in place at a double mat (2 layers within the walls) of #9 and #11 bars at a spacing of 24” on center each way. This reinforcing steel is a sturdy configuration –and a lot of steel — all of which is susceptible to corrosion if water is present after the shotcrete’s cure out.

That amount of steel, if subject to corrosion, could, over time lead to spalling and eventually an overall degradation of the structure if left unaddressed.

A Permanent Fix for Persistent Leaks

The SealBoss 2400 super low viscosity acrylic gel injection system was the answer for waterproofing parking cracks permanently.

The 2400 system is extremely well suited to seal structures with very fine and hairline cracks and fissures.

The 24’ high walls needing injection stood atop a 6’ thick cast-in-place mat slab and were +/- 24” thick. Extending from the tops of the walls to grade were 4’ high cast-in-place ring beams. By drilling into the walls 22” (not all the way thorough) and setting mechanical packers into the drilled holes, the delivery of the SealBoss 2400 system was now possible to as was its migration within the substrate.

The environmentally friendly SealBoss 2400 offered outstanding penetration properties similar to plain water, allowing it to permeate throughout the wall’s network of fissures, no matter how tight and narrow. In some instances, the material would shoot out of pinholes and cracks barely visible to the naked eye several feet away, further showcasing its ability to navigate the concrete’s crack and pore network thoroughly and effectively. Once gelled, the material prevented unwanted water migration to reinforcing steel within the substrate.

Mission accomplished

If there are any questions about this project in need of answering please do not hesitate to contact us, we are here to assist in any way we can. Always remember to work safely by wearing eye protection and gloves when handling any type of chemicals. We hope you enjoyed our review of the project outlined above and encourage you to explore our website to learn more about our vast array of waterproofing solutions for concrete structures.

Video – Acrylate Gel Injection SealBoss2400
Super Low Viscosity Penetration Properties

– See How SealBoss 2400 Pushes through
Finest Cracks and Fissures
– See Port to Port Injection Technique
– See Product Travel of Several Feet

SealBoss 2400 Gel Injection System

Links to Leak Sealing with SealBoss Acrylate/Acrylic Super Low Injection System

SealBoss Acrylate/Acrylic System

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Acrylate

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Polymer Pump for Acrylate Gel Injection

Introducing the New and Enhanced SealBoss® IP2C Generation 2 Gel Injection Pump

A true pioneer in next-generation acrylate gel injection technology, the SealBoss® IP2C Gen 2 is crafted with meticulous attention to detail and a relentless commitment to innovation, longevity, and functionality. This professional polymer pump sets unprecedented standards in quality, performance, design, and ease of ownership, making it a leader in its class.

The SealBoss® IP2C Gen 2 is the epitome of modern engineering excellence, featuring a robust stainless steel pump body for unmatched durability, precision, and exceptional corrosion resistance. Equipped with a dedicated water flush pump, it is specifically designed for use with acrylate gel injection products, ensuring efficient and seamless operation.

This state-of-the-art polymer pump is more than just a tool—it is a cornerstone of efficient construction and repair work, providing the reliability and performance that professionals trust.

Optimal Compatibility and Use

The SealBoss® IP2C Gen 2 polymer pump is designed to work seamlessly with quality acrylate injection resins and a variety of buttonhead packers, which enhances its compatibility and utility across numerous applications.

We recommend pairing this polymer pump with our SealBoss Super Flexible Acrylate Gels and SealBoss Buttonhead Injection Packers to achieve the best results and performance.

Environmentally Friendly Cleaning with Water when used with Acrylate Injection Gels

Maintaining this polymer pump is straightforward and efficient. For short breaks in the injection process, the mixing head can be flushed using water via the dedicated flush pump, which includes a separate suction tube and flush pressure line. Users can easily switch the applicator handle to flush mode for this purpose.

After completing your injection tasks, it is crucial to perform a thorough cleaning of the entire polymer pump system. Simply place the suction hoses into a tank filled with flushing agent and operate the pump at a lower pressure setting. This cleaning regimen ensures that every component of the polymer pump is free from contaminants and ready for its next use, maintaining the system in optimal condition.

Comprehensive Package and Features

This comprehensive system includes a triple set of 15-foot high-pressure hoses coupled with an equally robust set of suction hoses, ensuring extensive reach and flexibility in various working environments. Each polymer pump component operates independently—two dedicated product component pumps and an independent water pump—culminating in a high-performance mixing head housed within the heavy-duty applicator. This setup ensures precise mixing and application, with a disposable plastic element static mixer that epitomizes ease of use and efficiency.

To prevent any possibility of cross-contamination between components, the polymer pump is equipped with sophisticated built-in check valves. An integrated high-pressure flush pump allows for straightforward cleaning of the mixing chamber through a separate flush line, ensuring that the system remains pristine even when work is momentarily paused.

Advantages of Using SealBoss® IP2C Gen 2 Polymer Pump

Enhanced Durability and Corrosion Resistance
The stainless steel pump units construction ensures longevity and resistance to corrosion.
High-Performance Mixing and Application
The independent pumping system and state-of-the-art mixing head deliver precise and consistent applications every time.
Ease of Maintenance
With integrated flushing systems and easy-to-follow procedures, maintaining this polymer pump is hassle-free.
Versatility
Suitable for a wide range of environments and applications, from simple repairs to complex construction projects.
Cost-Effectiveness
Minimize waste and maximize efficiency with precise application and reduced need for frequent repairs or replacements.

In Conclusion

The SealBoss® IP2C Gen 2 Gel Injection Polymer Pump is more than just a piece of equipment; it is a vital ally in the construction and repair industries, designed to meet the highest standards and tackle the toughest challenges. Whether you’re sealing foundations, repairing concrete, or handling intricate waterproofing projects, this polymer pump promises performance that professionals can depend on. Embrace the future of construction and repair with SealBoss® IP2C Gen 2, the ultimate polymer pump for your acrylate gel injection needs.

SealBoss 2400 Gel Injection System

Links to Leak Sealing with SealBoss Acrylate/Acrylic Super Low Injection System

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Acrylate Resins

Acrylic Polymer Injection

Introduction

Acrylate resins have become a cornerstone in construction and repair due to their hydrophilic nature, flexibility, and ultra-low viscosity. These properties make them ideal for sealing and waterproofing applications, as they can easily penetrate fine cracks and adapt to structural movements.

SealBoss 2400 SealGel SLV Acrylate Gel exemplifies these advantages, offering an environmentally friendly, two-component hydrophilic polyacrylate gel with outstanding penetration properties.

Its ultra-low viscosity allows it to flow into the finest cracks and fissures, effectively sealing hairline cracks and porous structures such as masonry, cementitious grouts, blocks, and brick. This makes it particularly suitable for applications like tunnel and shaft sealing, soil stabilization, and curtain injection.

Acrylate Resins: The Ultimate Solution for Leak Sealing and Waterproofing

Acrylate resins have revolutionized the construction and repair industry, offering a highly effective, flexible, and durable solution for sealing leaks and waterproofing a variety of structures. Whether used for crack injection, curtain injection, soil stabilization, or infrastructure repairs, acrylate resins provide a long-lasting, reliable seal that adapts to the needs of different environments. These resins are particularly valued for their hydrophilic nature, ultra-low viscosity, and adjustable gel time, making them ideal for applications where precision and adaptability are critical.

Acrylate Resins are a popular choice in construction and repair work, and here is why:

Hydrophilic Nature: One of the standout features of acrylate resins is their ability to absorb and interact with water. This property makes them highly effective in wet environments, as they actively seek out moisture to form a watertight seal. This is particularly useful in applications such as tunnel waterproofing, underground construction, and dam repairs.
Exceptional Flexibility: Acrylate Gels are super flexible, perfect for non-structural injection into cracks, gaps, and other spaces. This flexibility ensures that the seal remains intact despite shifts or structural movements, reducing the risk of recurring leaks. Whether it’s crack injection, injection hoses, compartment setups, or large area injections, such as grid or curtain injection, acrylate resins have got you covered.
Ultra-Low Viscosity for Maximum Penetration: Acrylate resins have a water-like consistency, allowing them to penetrate microcracks and porous materials that other sealants might miss. This super-low viscosity ensures deep penetration and complete coverage, making them an excellent choice for hairline crack injection, soil stabilization, and waterproofing porous substrates like concrete and masonry.
Adjustable Gel Time for Precise Application: Depending on site conditions such as temperature, injection distance, and material porosity, the gel time of acrylate resins can be adjusted to slow down or speed up the curing process. This makes them versatile and suitable for different application scenarios, from rapid-response leak sealing to long-distance injection in extensive underground networks.
Hydrophilic Swelling for Leak-Proof Seals: Acrylate resins exhibit a swelling effect upon contact with water, ensuring a tight, durable seal that remains effective even under fluctuating conditions. This makes them the go-to solution for water-bearing concrete structures, basements, and retaining walls.
Eco-Friendly and Easy Cleanup: Spills or excess? SealBoss 2400 acrylate resin formulation is water-based and environmentally friendly, reducing the impact on the surrounding ecosystem. Additionally, any uncured excess material or spills can be easily cleaned with water, making them user-friendly and safe to work with.

In short, if you’re looking to seal or repair water bearing concrete structures, Acrylate Resins might just be your best bet!

SealBoss 2400 Acrylate Gel Resin – A Premium Solution

SealBoss 2400 is a high-performance, super flexible and ultra-low viscosity injection alternative in the world of Water Stop and Leak Sealing:

Key Features of SealBoss 2400

Super Flexible & Ultra-Low Viscosity: SealBoss 2400 offers an exceptionally fluid consistency, allowing it to reach the smallest cracks and gaps while maintaining long-term flexibility. This prevents future leaks by ensuring comprehensive penetration and adaptation to movement within the structure. The added flexibility is crucial as it allows the resin to adapt and move with the natural expansion and contraction of materials, reducing the risk of future leaks or damage.
Hydrophilic Acrylic Formulation: SealBoss 2400 is designed to produce a robust yet flexible gel gasket, making it ideal for handling expansion joints, curtain injection, and compartmentalized waterproofing systems.
Versatility in Application: Whether it is for a primary injection, a secondary pass to tighten up, or for injection tubes, SealBoss 2400 is your go-to solution.
High Performance & Durability: This advanced resin provides long-lasting waterproofing, preventing leaks even in the most demanding conditions. It is widely used in subway tunnels, underground parking garages, and infrastructure repairs.
Eco-Friendly Water-Based Formulation: SealBoss 2400 is a sustainable and environmentally responsible choice, offering high-performance sealing.

Why Choose Acrylate Resins for Your Next Project?

When it comes to sealing cracks, waterproofing structures, and preventing leaks, acrylate resins are unmatched in their performance, adaptability, and longevity.

Their hydrophilic nature, flexibility, and ultra-low viscosity make them ideal for a wide range of applications, from industrial infrastructure to residential waterproofing.

By choosing high-quality acrylate resins like SealBoss 2400, professionals can ensure durable, watertight, and environmentally friendly solutions that stand the test of time. Whether you’re working on leak-sealing tunnels, strengthening foundation walls, or repairing water-damaged structures, acrylate resins offer a proven and reliable approach to waterproofing and structural protection.

For the best results, always select premium-grade acrylate resins from trusted manufacturers like SealBoss, ensuring superior performance, ease of use, and long-term durability.

With SealBoss 2400, you are selecting efficiency, ultra low viscosity, user friendliness, and excellence all in one package!

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