Liquid Sealants

Hardcast manufactures water and solvent based liquid applied mastic/sealants for sealing metal, flexible and rigid fiberglass ductwork. The mastic/sealants are either fiber reinforced or non-reinforced and are available in white or gray. These products are listed by UL (Underwriters Laboratory) having UL-181 A-M and/or UL-181 B-M. All water based sealants are GREENGUARD Gold (UL 2818) certified. Available container sizes range from 11 oz. caulking tubes to 1 and 5 gallons pails.

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Tech Tip Volume 12 - Shelf Life and Batch Code Decoding
Tech Tip Volume 10 - Sealants and Coatings
All VOCs contained in Hardcast sealants are in the product to guarantee and enhance performance. Hardcast also does not use exempt solvents that could be dangerous to the applicator or building occupant.
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