1/2" x 60 yds. 3M - 425 Aluminum Foil Tape. Thermally conductive for heating or cooling efficiency and provides water proofing barrier and air leak protection. Premium Grade._x000D_ Aluminum backed tape features acrylic adhesive._x000D_ Flame resistant, heat and light reflective._x000D_ Improves visibility by magnifying light sources._x000D_ Resists ultraviolet degradation ensuring long lasting performance._x000D_ Meets UL 723, Class L File R 7311 and UL 764c._x000D_ Data Sheet