Foundation Crack Injection

Arguably its most significant advantage, polyurethane can be used regardless of the condition of the crack and the weather. ... Polyurethane injection can involve a crack flushing process to clean out the crack prior to injection. The chemical expansion of the polyurethane (typically 5-10 times its original volume) makes polyurethane very effective at filling voids within the concrete; these voids are typically invisible when you look ... Occasionally, high injection pressures are required to fill cracks that are very fine and/or when concrete is completely saturated with water and therefore weak. ... The rapid curing of polyurethane is beneficial when a leaking crack is flooding the basement; this is an important attribute when waterstopping is urgently needed. Like the epoxy crack injection, the low pressure polyurethane crack injection provides the injection technician with positive confirmation that the crack has been filled completely. Because water accelerates the curing process for polyurethane, the effectiveness of a polyurethane crack injection can be confirmed while the injection is in progress.