3M™ Venture Tape™ UL181B-FX Polypropylene Duct Tape 1599B handles sealing and closing applications for air ducts and connectors with excellent flexibility. Get great performance in cold weather or high humidity –– or anywhere within an extreme temperature range of -40 °F (-40 °C) to 185 °F (85 °C) –– thanks to its specially designed acrylic adhesive. The excellent air connector sealing and closure properties hold up well, even with irregular surfaces, through its highly conformable, bi-axially oriented polypropylene (BOPP) backing. This silver duct tape works on fiberglass, foam, metal, and fibrous materials. Save time and guesswork with its easily-visible UL181B-FX safety rating, printed on the exterior. Solve all your air connector and duct issues in hot- and cold-weather environments with the long-lasting, durable, 3M™ Venture Tape™ UL181B-FX Polypropylene Duct Tape 1599B.