HARDCAST® Duct-Seal™ Water-Based Duct Sealant, Series: 321 Series, 1 gal Net Content, Pail Container, Composition: De-Foaming Agent, Nonylphenol Polyethylene Glycol Ether, Polymer, Ethyl Acrylate and Methacrylic Acid, Polycarboxylate Salt, Ethylene Glycol, Fuller's Earth, Ammonia, Limestone, Titanium Dioxide, Methanol, 4, 4-Dimethyloxazolidine, Mixture Carbamic Acid Mixture, Solid Form, Gray/White, Slight Ammonia Odor/Scent, Synthetic Latex Base, 8.4 to 9.5 pH, 212 deg F Boiling Point, Applicable Materials: Duct Fabric, Glass Fiber Duct Board, Metal Duct