PU (Polyurethane) foam for insulating, mounting, filling and fixing. Excellent to concrete, brickwork, plaster, stone, wood and several synthetic material, such as polystyrene, pu foam, polyester and PVC. Resistant to heat, water and several defective . Not UV resistant. CFC and HCFC free.The systems foams to 30-40 times its volume in the presence of water & can be an effective means of arresting running water leakage.