3-way Foil-Scrim-Kraft backing, combined with a transparent high performance synthetic rubber-resin adhesive, protected by an easy-release silicone release paper. Reinforced aluminum substrate gives exceptional tensile strength. Superior temperature. Service temperature range from -20° to +80°cUsed in the hvac (heat, ventilation, and air-conditioning) industry to seal off vapor in ducting systems, or for thermal conductivity. Roofing applications - flashing, joints & insulation. Reflecting heat & light from sensitive areas. Temporary sealing of gaps- ac installation tape ac line insulation tape air conditioner vent tape air conditioning foil tape for heating ducts air conditioning sealing tape air duct aluminum foil tape for hvac ductwork tape air duct insulation tape air duct repair tape air duct sealing tape aluminum foil hvac tape aluminum foil tape for ductwork aluminum foil tape hvac aluminum tape on exhaust aluminum furnace tape aluminum reinforced tape aluminum tape for ducts aluminum tape for ductwork insulation tape aluminum tape water heater vent tape best hvac foil tape best tape for ac unit best tape for air ducts best tape for heating ducts best tape for sealing ducts with foil tape for ac ducts