McGill AirSeal’s “United Duct Sealer” set the industry standard for duct sealers nearly 40 years ago. Since then, we have gro ... wn to be the nation’s leading supplier of duct sealants and insulation adhesives. We’ve done this by continually responding to our customers needs, providing them with a versatile line of UL Listed and Classified products that fulfill a wide-variety of performance and economic requirements. McGill AirSeal offers solvent-based and water-based duct sealants and insulation adhesives for low-, medium-, and high pressure duct systems. These systems include indoor and outdoor commercial, industrial, and residential applications. read more