ALF201L-UL is engineered and designed to meet UL181A-P and UL181B-FX. (printed for easy identification / inspection). Uses include general purpose seaming, patching and sealing of rigid fiber air duct and connector closure systems to enhance appearance and maintain vapor barrier integrity. The aggressive acrylic pressure-sensitive adhesive provides long-lasting adhesion to clean/dry surfaces. Flame retardant, high shear adhesion, UV and mold resistant. Excellent reflective properties (i.e. heat, light). Superior bonding when exposed to either sub-zero or elevated temperatures. Release coated kraft liner.