Constructed with a woven fiberglass backing, 3M™ Glass Cloth Tape 361 features a pressure sensitive silicone adhesive for applications requiring high-temperature resistance, high adhesion and clean removal. It is often used for high temperature applications such as sealing ducts and as a back-up strip for submerged arc welding. - Our tape can withstand 450 °F and at intermittent temperatures up to 550 °F or higher, depending on the type and duration of the heat source. Permanent sealing of high temperature ducts or chambers.