Duct-Seal 321 is a GreenGuard® Gold certified, all-purpose, industrial-grade duct sealant for all-types of metal duct, fiberglass duct board, duct fabric and flex duct. It includes UV inhibitors for extended outdoor exposure and built-in fiber reinforcement for added strength. This non-toxic water-based product is solvent-free and is suitable for residential use.
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
| Boiling Point | : | 212 deg F |
| Color | : | Gray |
| 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 |
| Container Type | : | Pail |
| Coverage Area | : | 130 ft |
| Density | : | 1.34 to 1.41 g/cc |
| Dry Time | : | 48 hr |
| Evaporation Rate | : | 28 to 32 % |
| Form | : | Paste |
| Net Content | : | 1 gal |
| Odor/Scent | : | Slight Ammonia |
| Series | : | 321 Series |
| Shelf Life | : | 1 year |
| Temperature Rating | : | 35 to 110 deg F |
| VOC Content | : | 92 g/L |
| Vapor Density | : | <1 g/cc |
| Vapor Pressure | : | 17 mmHg |
| Viscosity | : | >30000 cPs |
| pH Range | : | 8.4 to 9.5 |
- All-purpose, industrial-grade duct sealant
- Enhanced UV inhibitors and mold/mildew-resistance
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