The 3M™ Venture Tape™ UL181B-FX Mastik Foil Tape is a 2.0 mil aluminum foil coated with a heavy application of mastic adhesive that is UL181B-FX Listed.
The 3M™ Venture Tape™ UL181B-FX Mastik Foil Tape applies easily to fibrous, flexible, and sheet metal ducts, and conforms to irregular surfaces.