Repairing and sealing sheet metal ductwork, flexible duct, fiberglass duct board, and crawl spaces with RCD Corporation® adhesives, mastics, and insulation coatings improves indoor air quality, saves energy, electricity, money, and reduces carbon emissions.

RCD Corporation® #7 Mastic® Low to High Velocity Air Duct Sealant is a premium grade, water-borne, gray, flexible sealant used to permanently seal the fabricated joints and seams of sheet metal air ducts, rigid fiberglass air ducts, flexible air ducts, crawl space vapor retarders and thermal insulation.

#6 Mastic® Low to High Velocity Air Duct sealant is used to permanently seal the fabricated joints and seams of thermal insulation, crawl space vapor retarders, house wrap and all air duct types including UL Listed air ducts. RCD Corporation® #6 Mastic® is preferred by architects, weatherization agencies and contractors

RCD Corporation® #6 Mastic® Low to High Velocity Air Duct Sealant is a fiber reinforced, water-borne, white, UL listed, flexible, sealant used to permanently seal the joints and seams of flexible air ducts, ductboard (rigid fiberglass air duct), sheet metal air ducts, thermal insulation, crawl space vapor retarder, house wrap and UL listed ...

RCD Corporation® #6 Mastic® Low to High Velocity Air Duct Sealant is a fiber reinforced, water-borne, white, UL listed, flexible, sealant used to permanently seal the joints and seams of flexible air ducts, ductboard (rigid fiberglass air duct), sheet metal air ducts, thermal insulation, crawl space vapor retarder, house wrap, and UL listed ...

RCD Corporation #10 MASTIC® Air Duct Sealant, Specifications: 125 lineal ft/gal Coverage, 0 to 180 deg F Service, 45 to 90 deg F Storage, <50 g/L VOC, 7 to 8 pH Range, >162.7 deg C Flash Point, 1 gal Load Capacity, Tan. Warranty: 12 months. Standards/Certifications: UL Listed.

#10 Mastic® Low to High Velocity Air Duct Sealant is a fiber reinforced, water-borne, tan, UL listed, flexible, sealant used to seal flexible air ducts, ductboard (rigid fiberglass air duct), sheet metal air ducts, and UL listed air ducts. Seals damaged, leaking air ducts and conditioned spaces from air infiltration.

Duct sealant, #8 mastic, grey, 1 gal. The best choice for sealing high velocity sheet metal air ducts in auditoriums, high rises, hospitals, industrial ventilation, large retail stores, malls, military buildings, prisons, schools, and sports centers. Easily applied by brush, trowel, palm or s. RCD8G - Duct sealant, #8 mastic, grey, 1 gal.