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 injection is typically performed on dry substrates versus polyurethane injection that works very well on wet and actively leaking substrates. Epoxy injection is the preferred method where structural crack repair is desired.

Polyurethane injection is performed to seal active leaks, prevent moisture migration, and protect structures from corrosion and water-related decay. Polyurethane injection technology is superior in most wet and actively leaking environments.