Concrete Crack Injection

Concrete crack injection is the process of injecting polyurethane or epoxy at high pressure into the crack to stop water leaks or to fix structural integrity. Polyurethane is hydrophillic (attracted to water) and is used to fill cracks and stop leaks. Being hydrophyllic the polyurethane “likes” water and will track further into the leak for a more complete seal. The water activates the product causing it to foam and expand. Concrete crack injection is especially useful when access from the positive side of the wall is unavailable or too costly.

Crack Injection repairs have become commonplace in basement carparks due to the depth below the water table at which we are building these days. Most common areas to be injected are below ground areas (basement car parks, car stackers), Elevator lift pits, Rooftops, concrete cold joints.

Epoxy injection is used more to repair the structural integrity of the concrete and is usually done at a lower pressure than polyurethane. Epoxy has excellent strength and compression qualities.