RCD #7 Mastic® Low-High Velocity Air Duct Sealant is a premium grade, flexible, water-borne air duct sealant used to permanently sealing the fabricated joints and seams of sheet metal air ducts, rigid fiberglass air ducts, flexible air ducts, crawl space vapor retarders and thermal insulation. RCD #7 Mastic® is also perfect for repairing damaged, leaking air ducts and sealing conditioned spaces from air infiltration. The U.S. EPA's Energy Star program recommends insulating and sealing air ducts. Sealing and insulating air ducts along with home sealing and crawl space sealing will improve indoor air quality, reduce excess humidity and significantly reduce energy costs. Easy application by brush, palm, putty knife, trowel, or spray equipment. Color: Gray Size: Gallon For more caulking, fillers, mastic and/or spray foam air sealing options, please see links at the bottom of this page.
Smaller image enlarges to show RCD #7 Mastic® applied to sheet metal air duct joint. Please scroll down for Pricing & Availability!
Green Power Features & Specs
Water Resistant, Airtight Seal
Low Odor & Low VOC
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 a gallon of RCD #7 Mastic® 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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