Cold temperature aluminum foil tape for use in temperatures ranging from -30°C to 100°C when joining and sealing aluminum-backed or fibrous insulation and metal ductwork, as well as when repairing metal and sheet metal. is linered, designed with an acrylic adhesive, tested in accordance with UL 723 and delivers an airtight seal every time. Our Premium grade, aluminum foil tape (with liner) used for HVAC applications. It is recommended for use on UL listed fiberglass duct board. Ideal for permanent flexible seals. It can provide a durable seal for dryer ventilation and on rigid sheet metal ducts.