3M(TM) Scotch-Weld(TM) Hi-Temperature Polystyrene Foam Insulation 78 HT is a high strength, high temperature resistant, industrial grade spray adhesive with a long open time designed for bonding polystyrene and various roofing materials. Creates a high temperature resistant bond ideal for polystyrene panel bonding and roofing membrane attachment. Packaged in pre-pressurized canister for an easy to use, maintenance free delivery system.