HARDCAST® Water-Based Duct Sealant, Duct-Seal 321 Series, Model: 321-4, 1 gal Net Content, Pail Container, Composition: 0.1 to 1% De-Foaming Agent, 0.1 to 1% Nonylphenol Polyethylene Glycol Ether, 0.5 to 1.5% Polymer, Ethyl Acrylate and Methacrylic Acid, 0.1 to 1% Polycarboxylate Salt, 0.1 to 1% Ethylene Glycol, 0.5 to 1.5% Fuller's Earth, 0.1 to 1% Ammonia, 15 to 40% Limestone, 1 to 5% Clay Compound, 1 to 5% Methanol, 0.1 to 1% 4,4-Dimethyloxazolidine, 0.1 to 1% Carbamic Acid Mixture, Solid Form, Gray, Odor/Scent: Slight, Ammonia, Synthetic Latex Base, 24 hr Dry Time, 72 hr Curing Time, 80 sq-ft Coverage Area, 8.4 to 9.5 pH, 212 deg F Boiling Point, 92 g/L VOC, >300 kcPs Viscosity, Density: 1.34 to 1.41, <1 Vapor Density, 17 mmHg Vapor Pressure, Applicable Materials: Duct Board, Fabric, Fiberglass, Flex Duct, Metal, 1 year Shelf Life, Evaporation Rate: 28 to 32 %, 35 to 110 deg F