Venture Tape Duct Joint Sealing Mastik Tape (3" x 100')

VentureTape® 1580 is an aluminum foil coated with a heavy application of mastic adhesive. Provides an instant water resistant bond to most surfaces including sheet metal, duct board, flex duct, and duct wrap vapor barriers. 1580 stays flexible and resists releasing. Primarily used for superior vapor sealing of metal ducts. 100 feet long.