What Is Class 1 Duct Tape Used For?
What Is Class 1 Duct Tape Used For? UL 181B-FX Listed film tape for use on Class 1 Flex Duct for connecting, joining, sealing and patching flexible air ductwork. DC 181 features an acrylic adhesive system, high performance in temperatures ranging from -10 F to 210 F, and is clearly printed with the UL Listing