500 sqft Aluminum Foil Barrier Insulation Sauna Vapor Barrier Waterproof Strong

500 sqft Aluminum Foil Barrier Insulation Sauna Vapor Barrier Waterproof Strong 4 ft X 125 ft roll (500 sf) Ideal for Water Proofing a Sauna Double-sided 99.9% PURE reinforced ALUMINUM that blocks 97% of the radiant heat in summer and winter Industrialized strength with woven polyethylene scrim for tear resistance. Cannot be torn or ripped Passes required ASTM fire test (E84 using E2599 mounting method) for building materials