Firefoam B2 Gungrade is a quick setting fire rated, one part polyurethane foam designed for application by any standard foam applicator gun|Fire resistant for up to 2 hours in certain joint configurations|It expands on application to up to 50 times the can contents and meets the requirements of the test criteria for BS476 Part 20; Class B2|Gap filling|Fire retardent properties|Quick curing/drying|PVCu, plastic, brick, stone|Concrete, metals, timber