RCD Corporation Glasscoat Adhesive-Backed Fiberglass Mesh 3" X 180' 3 inch by 180 feet Roll - 10 x 10 Mesh Coated One Side with Pressure Sensitive Adhesive Reinforces Joints & Seams Sealed with Mastics & Sealants In the Fabrication, Installation, & Repair of Air Ducts & Thermal Insulation Apply a 25mil tack coat of RCD duct sealant Embed Glasscoat into the tack coat Apply finish coat of 25mils over the Glasscoat Sheet Metal, Fiberglass, &amp; Flexible Air Ducts Register Boots Vents &amp; Roof Caps Plenums Thermal Insulation Crawl Space Vapor Retarders