Polyurethane Injection – Foundation Repairs Using Polyurethane Foam in Montréal, West Island, Laval, and South Shore

Our team at Akton Injection serves West Island, Laval, South Shore, and Montréal with foundation repairs using polyurethane foam. These repairs help maintain safety and efficiency at your property. Polyurethane crack injection is a specialized methodology designed for sealing leaks through cracks, rock pockets, expansion and control joints in concrete structures. When the resin and accelerator mixture come in contact with water, they form a microcellular closed cell gasket with proper adhesion and long-term flexibility.

Polyurethanes are fast-setting, elastomeric, and most effective in sealing and waterproofing a crack that will be undergoing slight movement from seasonal temperature changes. One of the determining factors in deciding to use polyurethane is if there is a concern about leakage from the back of a crack. Another benefit of their fast-setting foam attributes is that it expands and hardens within minutes of injection in the crack. This reduces the likelihood of it flowing out at the back. While adding almost no structural strength, most residential applications don't require it.


An injection point in the middle will fill the crack throughout. The important features of polyurethane resin injection are:


 Specialized drilling technique

 Able to inject into a humid crack

 Flexible up to 250% to allow for future movement

 Withstands freeze and thaw cycles

 High-pressure injection up to 10,000 PSI

When to Use Polyurethane to Seal a Foundation Crack – Strengths and Limitations

 Flexible – allows for natural movement of concrete from thermal shrinkage and expansion.

 Repairs wet or even leaking cracks.

 Waterproofing – polyurethane has water repellant properties.

 Fills large cracks – polyurethane expands over 20 times its volume.


Polyurethane Versus Epoxy Crack Injection

Contrary to popular thought, one product is normally not better than the other. A typical repair requires an understanding of the environment and type of crack that the foundation repair contractor is trying to close and permanently seal. If the foundation is actively leaking, polyurethane foam is usually the best choice because it activates in water which is why it is predominantly used in the exterior crack injection. If structural crack repairs are required, use epoxy resin. Epoxies only work in a dry environment.

Polyurethane Injection Products

As your foundation contractor, Akton Injection can properly evaluate the needs of your home and use the appropriate product like:

Specton Flex F1000

Specton Rapid H100

Specton Ultrathin H40

Learn More about Epoxy Injection

Concrete epoxy injection is a system for welding cracks back together using an epoxy resin. The resin restores the original strength of the concrete. Structural restoration of concrete by epoxy injection is very often the only alternative to complete replacement. Epoxy injection protects rebar and stops water leakage.

Foundation Waterproofing

Since 1979, Akton Injection has specialized in the repair of concrete and concrete block foundation cracks. Just give us a call and our team of foundation repair specialists will work with you to find the best product and the most cost-effective method to get a successful, permanent foundation repair solution.

Call one of our representatives today or fill out our form for a free foundation repair quotation!

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