Injection epoxies cure chemically within a specified time and harden further over days and weeks. The components are blended in the static mixer of the injection pump applicator immediately before crack injection.
While curing epoxy creates a strong bond with the concrete substrate and ultimately provides a repair of high compressive and tensile strength properties.Įpoxy is a two component system, one component is the epoxy resin and the second is the hardener. Polyurethanes are designed to interact and expand in contact with moisture, making polyurethane injection technology superior in wet and actively leaking environments.Ĭomparison of the characteristics of epoxy and polyurethaneĮpoxies and polyurethanes are chemical resins with different reaction profiles and physical properties.Įpoxy is a strong adhesive or glue that does essentially not expand. Polyurethane injection is performed to seal active leaks, prevent moisture migration and to protect structures from corrosion and water related decay. 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.Įpoxy injection is typically performed on dry substrates versus polyurethane injection that works very well on wet and actively leaking substrates.įully cured high quality epoxy offers outstanding compressive and tensile strength properties, making epoxy injection the preferred method where structural crack repair is desired. Epoxy and Polyurethane Resin Based Crack Repair Systems are the Superheroes of Concrete Crack Repair
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