3M Venture Tape UL181B-FX Polypropylene Duct Tape 1599B handles sealing and closing applications for flexible 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 1.88 in wide, 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.