A silver-grey vinyl plastic tape with a synthetic rubber adhesive designed for duct sealing. The tape construction will not support combustion.
Tape is flame resistant, it will not support combustion. No. 474 is ideal for both warm and cold air ducts; either high or low velocity systems and dust collecting systems. No. 474's low moisture vapour transmission rate allows its use as a vapour barrier seal on both rigid and flexible insulation material, with plastic, foil, and paper coatings. Conformability provides increased heating efficiency by sealing irregular surfaces.
