Additional InformationUL 181A-M, UL 181B-M, Class 1 Rating and Local Codes, NFPA
Marketing InformationWater based fiber reinforced duct sealant/mastic formulated for indoor and outdoor use. Meets UL Class 1 rating and local codes while featuring long term flexibility and strength. Use on metal heating, ventilating and A/C duct systems; as well as fiberglass duct board systems and flex duct systems. Recommended for use to 10 in of water column pressure without the need for fiberglass mesh reinforcement.