Hifoam series based on MDI or prepolymer is a highly effective polyurethane grouting agent recommend for repair, reinforcement and waterproofing agent in concrete structure.
Upon contact with water Hifoam becomes a closed cell foam while expanding its volume up to 10-30 times. The cured material is flexible or rigid foam and does not shrink or swell.
So Hifoam is very well suited for the filling of large cavernous spaces and cracks in stone or concrete structure as well as for cutting off gushing water under high pressure and speed.
Due to low viscosity of the materials, Hifoam offers superior penetration in hairline crack injection.