Polymer Adhesives AirSeal Zero (ASZERO-1) solvent-based, high-velocity HVAC duct sealant mastic - gray, 1 gallon pail. Pressure-seals metal, fiberglass and duct board; ~76% solids, ~80 sq ft/gal coverage, UL 723 / ASTM E84 rated, service -40F to 200F.
