An excellent general-purpose ventilation sealing tape, this Imperial Metalized Poly Tape is strong and simple to use. Made without a liner, this tape can be torn by hand for faster and easier application, and its impressive holding power delivers a permanent bond. The tape is made of a UV-resistant treated polypropylene film and coated with high shear, high tack acrylic adhesive. It fights against mold, moisture, flame spread and smoke generation for safety and lasting reliability. Its temperature resistance makes it ideal for sealing flexible air ducts and air connectors, metal duct and connections, and foam insulation used for water pipes. Simply unwind it, tear it by hand and apply.