AV-640 Surelift (Slow)
AV-640 SureLift (Slow) is a dual component, HFC 245fa blown, all PMDI-based, pour-in-place urethane foam system engineered for concrete lifting and void filling in wet soil conditions. AV-640 SureLift (Slow)'s low viscosity design (Part A and B combined) allows the material to be blended together using typical mix machines or hand mixer. Slow is the speed of choice when the cavity to be filled is large. A delayed reactivity will allow longer shot times.