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Polymer Adhesives' 1-AS33-01W-00 Airseal 33-1 is a white, fiber-reinforced water-based duct sealant designed for HVAC systems. It is UL 181 A-M and B-M listed for pressure sealing various types of duct systems including metal, fiberglass ductboard, and flexduct.
Airseal 33-1 is engineered to seal high-pressure HVAC ducts and withstands harsh conditions. It exceeds SMACNA pressure and sealing class requirements and provides excellent resistance to mold and mildew.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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