UL Listed HVAC/Insulation Foil Film Tapes -
UL 181A-P/B-FX Listed aluminum foil tape for use on rigid fiberglass ductboard and flexible air duct. DC 181 UL 181B-FX Listed/Printed Film Tape UL 181B-FX Listed and printed film tape for use on Class 1 Flex Duct in temperatures from -10 F to 210