Mountain Grout GelFoam is a multi-purpose injection resin designed to seal leaking cracks, voids of fractures in concrete structures. The single component systems reacts with water to form foam, gel or an elastomeric mass. The resulting appearance of the polyurethane is dependent on the amount of water encountered. This hydrophilic formulation contains no TDI or solvents. The system benefits include high elongation, flexibility and easy installation. The liquid may be pumped as a single component or with water.