Venture Tape 1520CW Cold Weather Foil Insulation Tape is a 2 mil (50 micron) aluminum foil tape primarily used for improved vapor sealing of fiberglass ductboard, ductwrap and FSK systems. A 2 mil (50 µ) high strength aluminum foil coated with special cold weather acrylic adhesive system that combines superior quick stick at normal temperatures with superior low temperature performance at freezing (32°F or 0°C). The ultimate in cold weather tapes. Recommended for use at normal and high temperatures also.