Scotch Foil Tape 3311-10A, 2.0 in x 10 yd (50.8 mm x 9,1 m). Specifically designed to help maintain duct work integrity and optimize HVAC performance. conformable tape with silicone-treated liner that unwinds easily to minimize errors and wasted tape. It is flexible and easy to apply in tight spaces, making it the ideal tape for duct repairs. The soft aluminum foil also conforms to irregular surfaces and provides a reliable vapor barrier. For duct sealing and general repairs. Designed for duct tape sealing and general repairsConformable with silicone-treated linerUnwinds easily. Meets UL 723 standardsAggressive adhesive seals seams and joints for long term durability. For long term repairsSoft aluminum foil conforms to irregular surfaces and provides a reliable vapor barrier. Temporary and emergency repair of metal surfaces.