#Epoxy wood slab crack repair video Activator

The initial cure time for crack injection polyurethanes is generally 1 – 10 minutes and is influenced by accelerator usage, temperature and moisture availability.ĭifferences in The Epoxy and Polyurethane Crack Injection ProcessesĮpoxy crack injections are typically performed at lower injection pressures (20-200 psi) and with surface mounted ports. Polyurethane resins vary from rigid and strong to flexible, rubbery and soft. Their chemical and physical properties vary to suit the needs of specific applications and jobsite conditions. Polyurethane resins are also available in two component chemical cure variants.

#Epoxy wood slab crack repair video Activator

Resin and activator are mixed before they are injected. Polyurethane foam resin often utilizes an activator or accelerator. The cured product creates a compression seal of varying flexibility. Polyurethane injection foam is primarily a water activated sealant or leak-seal grout with expanding properties during reaction. 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. Comparison 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.