3M(TM) Scotch-Weld(TM) Polystyrene Foam Insulation 78 Cylinder Spray Adhesive Clear, Large Cylinder (Net Wt. 29.3 lbs), 1 per case 3M(TM) Scotch-Weld(TM) Polystyrene Foam Insulation 78 Cylinder Spray Adhesive Clear, Large Cylinder (Net Wt. 29.3 lbs), 1 per case Aerosol adhesive designed to bond foam board inslation to exterior walls, interior walls and roof applications. Will not attack expanded or extruded polystyrene making it the ideal choice for insulation applications. It has a heat resistance of 140 F.