Hardcast Duct-Seal 321 Duct Sealant, Water Based, 5 gal, Pail, 0 g/L Exempt, 93 g/L Non-Exempt VOC, Thixotropic, Liquid, Gray, Up to 320 ft Liner at 3 Inch W, 20 mil T Coverage, 48 hr Drying, Brush, Putty Knife and Caulk Gun, -20 to 200 deg F, Resists: Water, Mold and Mildew
Duct-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 runouts. 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.
- Water solvent
- Synthetic latex base
- Passed 5 cycles freeze/thaw stability
- Surface must be dry and free of dirt, oil and grease
- Apply at joints and fasteners 20-mil-thick wet ? lm
- Non-?ammable
- One year (unopened) shelf life
Standard/Approvals: ASTM C-731, ASTM D-2202, USDA, EPA and FDA Approved, LEED compliant
