3M™ FSK Facing Tape 1525CW is an adhesive tape that is used for sealing and patching FSK-faced duct wrap insulation, as well as a vapor seal for reinforced aluminum faced fiberglass, mineral wool thermal insulation, and sheet metal. Made with foil/scrim/kraft (FSK) lamination that is coated with a solvent acrylic, pressure-sensitive adhesive, this tape bonds and seals at temperatures as low as -10 °F (-23 °C). While designed for cold weather, it also offers excellent performance in demanding heat and humidity conditions. It easily conforms to irregular surfaces and shapes and offers easy removal for a simple application process. This tape meets the UL723 flame/smoke rating, as well as the ASTM specification C1136, Type II and IV, for safe use. For best results, store tape in a cool, dry environment. Achieve a durable seal during demanding and cold weather applications with 3M™ FSK Facing Tape 1525CW.