Duct Sealant & Mastic

Water based and solvent based duct sealant and mastic for sheet metal and flex duct joints and seams — Hardcast/Carlisle Versa-Grip, Flex-Grip, Iron-Grip, Sure-Grip, CCWI-181 and DS-321; RCD #6, #8 and #9 Mastic; Polymer Adhesives Airseal and CADS; and Design Polymerics DP series. Stocked in 1 and 2 gallon pails and in 10.6 to 11 oz cartridges.

Water based mastics clean up with water and are the default for indoor sheet metal seams. Solvent based sealants such as DS-321 cure in cold or damp conditions where a water based product will not. Fiber reinforced grades bridge wider gaps without a tape backing. Cure time, temperature range and full hazard data are on the SDS linked from every product page.

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