#6 Mastic 11 fl oz
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 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.
11 fl oz caulk tube