Foil-Grip Rolled Mastic Sealant by Hardcast

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UL 181-B-FX listed pressure sensitive, 40-year cycle, duct joint and general purpose rolled sealant. Cut to desired length, peel off release liner, apply with enough pressure to assure complete contact. Provides an instant water-resistant grip to most surfaces including sheet metal, duct board, flex duct, PVC coated duct, and vapor barrier duct wrap. Cannot be repositioned after application; must be removed using solvent and new length applied. Mill finish aluminum substrate with butyl adhesive/sealant. Applied product is 17 mils thick, fully bonds in 24 hours with zero VOC offgassing. Available in single 100′ rolls in 2″ or 3″ widths, or by the case (24 – 2″ rolls or 16 – 3″ rolls)



Product of choice for sealing air duct joints. Duct joint and general purpose rolled mastic sealant.

Additional information

Weight 2 lbs
Dimensions 8 × 4 × 4 in

2in, 3in


1, 24, 16


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