RCD Corporation® #6 Mastic® Low to High Velocity Air Duct Caulk 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 air ducts. #6 Mastic® Caulk 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. Sealing the home from air infiltration, sealing air ducts and crawl space sealing improves indoor air quality, reduces humidity, improves indoor comfort and saves energy. Non-toxic, non-flammable, and dries to the touch in 30 minutes. This tube of Mastic is for use with a caulk gun. Color: White Size: 11oz For more caulking, fillers, mastic and/or spray foam air sealing options, please see links at the bottom of this page.
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Green Power Features & Specs
Fiber Reinforced, Weather Resistant
Low Odor & Low VOC
UL Listed, Earns LEED Credits
Made In the USA
Our goal is to offer great products at great prices! Save even more when you buy TWO (2) or more pails.
FREE SHIPPING on most orders of $99.00 or more! Low Flat Rates on all other orders, with Two-Day delivery to many locations! This means you can get up to eight (8) tubes of RCD #6 Mastic® Sealant Calk for only $7.95 shipping! Or just add more stuff to qualify for free shipping when your order totals $99.00 or more!
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