Starting at $46.57. CCWI-181™ Duct Sealant - Gray - 1 Gallon Product Highlights CCWI - 181™ is a versatile, all purpose duct sealant for use on all types of metal duct, glass fiber duct board, and flex duct, as well as duct fabric and flexible tubing runouts. CCWI-181 Indoor/Outdoor Water Based Duct Sealant A versatile, all purpose duct sealant for use on all types of metal duct, fi berglass duct board, duct fabric and fl ex duct. Starting at $48.14. Hardcast CCWI-181 Cartidge Indoor/Outdoor Duct Sealant in White. VersaGrip/CCWI 181 Page 4 of 6 _____ 9. 1 - 5-Gallon Pail (Gray) .....304149 Compliant with LEED Requirements Compliant with LEED Requirements A versatile, all purpose duct sealant for use on all types of metal duct, glass fiber duct board, and flex duct, as well as duct fabric and flexible tubing runouts. Starting at $2.82. APPLICATION CCWI- 181 incorporates a built-in polyester reinforcement for exceptional strength, with UV inhibitors for outdoor use. Optional Products. Starting at $48.14. Available Downloads. CCWI - 181 incorporates a built-in polyester reinforcement for exceptional strength, with UV inhibitors for outdoor use. Search by Manufacturer or Category; if you do not find an SDS that you require, use our contact page to request a more information regarding this sheet. Hardcast CCWI-181 Cartridge in Grey. Hardcast CCWI-181 Indoor and Outdoor Water Based Duct Sealant. Results 1 - 2 of 2: Product and Description; MARS 78903: Hardcast CCWI-181 Indoor/Outdoor Mastic in Gray. Buy Hardcast CCWI-181 (Gray) Duct Sealant - 1 Gallon (Gray). Hardcast CCWI-181 Indoor/Outdoor Mastic in Gray. Starting at $46.57. Hardcast CCWI-181 Cartidge Indoor/Outdoor Duct Sealant in White. SDS: PDF: View: Return To Top. Hardcast CCWI-181 Indoor and Outdoor Water Based Duct Sealant. PHYSICAL AND CHEMICAL PROPERTIES Appearance: White/Gray Mastic Vapor Pressure: 17 mm Hg @ 20ºC Odor: Typical latex with slight ammonia odor Vapor Density (air=1):