Product HighlightsDuct-Seal 321 in an all purpose industrial grade duct sealant for all types of metal duct, glass fiber duct board, and flex duct, as well as duct fabric and flexible tubing run outs. 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.
California residents: see Proposition 65 Warning
Weight 0.90 Pounds Length 1.75 Inches Width 1.75 Inches Height 11.25 Inches Country of Origin USA Brand Hardcast/Carlisle Service Temperature -20°F to 200°F (-28.8°C to 93.3°C) Solvent No Application Temperature 35°F to 110°F (1.6°C to 43.3°C) Coverage Up to 320 lin. Ft. at 3" width, 20-mil thickness Dry Time 48 Hrs Shelf Life 1 Year Unopened Solids Content 65% Storage Temperature 35°F to 110°F (1.6°C to 43.3°C) Flexibility Passes 1/4" mandrel bend Application Brush, Putty Knife, Caulk Gun or Trowel Approvals UL 181 B-M, UL 723 & City of Los Angeles Base Synthetic Latex Color Gray Composition Synthetic Latex For Use With 304316 - Caulk Gun Functions Duct Sealant Ratings Not Provided Size 11 Ounce Standards ASTM E-84, ASTM C-731, ASTM D-2202, SCAQD Rule 1168, NSF, FSIS, & Michigan Department of Quality Criteria Type Liquid Sealant Viscosity Thixotropic UL Listed No UL Recognized No
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