ASMACO GOLD PU FIRE RETARDANT B1 FOAM is a quick setting single component polyurethane foam with fire rating properties up to 240 minutes. It provides a fire rated seal around window & door frames. It exhibits excellent adhesion to wood, metals door/window frames, glass, painted surfaces, some plastics, concrete, plasters etc after curing. Due to its closed cell structure, cured foam is resistant to water absorption. Cured foam dries rigid & can be trimmed, shaped & sanded . It has excellent thermal insulation characteristics & can be used for insulating hot/cold water piping, refrigerating systems etc.