Water Stop Crack Injection
Leak Sealing & Permeation Grouting

Importance of Choosing the Ideal Product for Your Project

The selection of the right product for leak-seal and crack injection applications is paramount to a long-lasting, successful outcome. It is crucial to pick a material with the appropriate physical properties to simplify the application and ensure long-term durability. SealBoss presents a wide range of hydrophilic and hydrophobic products, each with specific properties such as viscosity, expansion rate, reaction time, flexibility, density, and hardness. We encourage you to consult your SealBoss representative for tailored advice to suit your project requirements.

Understanding Hydrophobic and Hydrophilic Product Groups

Our SealBoss 1510/1570/1570LV/1500 Water Stop Foam grouts and crack injection foams are hydroactive hydrophobic polyurethane grouts with shared characteristics. While water/moisture initiates the reaction, the cured product remains impervious to moisture and maintains a constant volume. As water is not a constituent of the foam structure, the cured material essentially remains unaffected by water or dryness and does not shrink or swell. These hydrophobic crack injection grouts stand resilient against freeze/thaw and wet/dry cycles. Furthermore, our SealBoss 1640 Foam and SealBoss 1403 PUR Resin are hydrophobic polyurethane resins that do not necessitate water for reaction.

On the other hand, SealBoss FlexGel and SealBoss 2400 Acrylate Gel (Acrylic Gel) are hydrophilic gel products. These compounds react with water/moisture and are capable of absorbing and incorporating water post cure. As a result, they swell and form a waterproofing flexible gel or foam. We recommend hydrophilic products for applications in consistently moist environments, curtain/bladder injection, and capillary injection.

Role of Viscosity

Our SealBoss 1510/1570/1500 Water Stop Foams and Flexgel leak-seal grouts possess low viscosity, enabling excellent penetration into concrete cracks and joints. For hairline cracks, capillary fissures, and tight cold joints, we provide super low viscosity products such as SealBoss 1570LV Water Stop Foam, SealBoss 1403 PUR Resin, SealBoss 2400 Acrylate (Acrylic) Gel.

Controllable Hydro Active Expansion & Reaction Time via Adjustment with Accelerator Percentage

By adding a specific amount of SealBoss accelerator, the reaction times and expansion rates of SealBoss 1510 HighFoamer /1570/1570LV Water Stop Foams can be adjusted. This flexibility also extends to SealBoss 1403 PUR Resin and SealBoss 2400 Acrylate (Acrylic) Gel with their respective accelerators. The reaction time and expansion rate of a foam significantly influence the water stop and penetration properties of the product.

Fast reaction times and expansion support water cutoff properties, while slower reaction times enhance product penetration in the substrate.

Water-reactive polyurethane grouts expand upon contact with water due to the resulting CO2 gas. This foam expansion forms a compression seal that boosts the sealing properties of the injection grout. Rapid expansion assists in cutting-off high-volume active water leaks and aids curtain/bladder grouting. The expansion rate of a foam affects material consumption, cell structure, and the density of the cured product. It’s important to note that expanding foams can generate significant pressure. Our industry-standard SealBoss 1510 Water Stop Foam can rapidly expand between 5 to 50 times (50X) of free rise product volume when catalyzed accordingly.

Flexibility & Density

For most injections in joints, cracks, and some curtain/bladder wall grouting that do not experience considerable movement, semi-flexible standard products with high expansion rates and higher compressive strengths, such as SealBoss 1510 Water Stop Foam and SealBoss 1500 2-Component Water Stop Foam, are typically chosen. In cases where structures are exposed to thermal expansion and contraction or dynamic loading, resulting in increased movement, a flexible formulation grout such as SealBoss 1570/1570LV Water Stop Foam, SealBoss 1403 PUR Resin or SealBoss Flexgel may be necessary. For critical foam injection areas, we often recommend SealBoss 1403 PUR Resin as a follow-up and final leak-seal injection.

Successful leak sealing injection is largely dependent on the product’s density, complete penetration, and adequate product consumption. It is essential that the injection pressures are high enough to ensure efficient material travel, optimal penetration, and proper density. We always recommend monitoring injection pressures and material flow closely. When conducted correctly, the high-density injection material will form a compression seal and provide a long-lasting application.

Our selection of products, their tailored usage, and the various techniques that can be employed, underscore the flexibility and adaptability of SealBoss solutions. Trust in our expertise to guide you towards the most fitting and robust solutions for your project’s unique requirements. Please feel free to reach out to your SealBoss representative for more detailed information and guidance.