Engineered for superior bonding when exposed to either sub-zero or elevated temperatures. -58 F (degree Fahrenheit) to +200 F application temperature. Developed for general-purpose HVAC duct seaming, patching, and sealing to enhance appearance and maintain vapor barrier integrity. Helps block odors and prevent heating and cooling loss. Aggressive acrylic adhesive provides long-lasting adhesion to clean, dry surfaces. Flame retardant, high shear adhesion, UV-resistant and excellent reflective properties. Meets HUD/BOCA codes. UL-723/ASTM E84 rated for flame spread and smoke development. 2' x 50 yd.