RCD Corporation #6 Mastic is a water-borne, low VOC, fiber reinforced, non-flammable, non-toxic, low to high-velocity air duct sealant used to fabricate and repair thermal insulation and all duct types including UL listed air ducts. It seals the seams of crawl space vapor retarder and house wrap; seals the leaks in return air ducts, supply ducts, air handlers, plenums, grilles, registers, dampers, and boots and is used in home sealing to reduce air infiltration into the living area. Easy application by brush, trowel, palm, spray, or extrusion. Earns LEED credits. The color is Cream White. Store at temperatures between 45 F and 90 F. Apply at temperatures between 35 F and 120 F.
Comes in either 1 or 2 gallon pail.