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Feature

Duct-Seal 321 is an all-purpose industrial-grade duct sealant for all types of metal duct, fiberglass duct board, duct fabric and flex duct.
Includes UV inhibitors for extended outdoor exposure and built-in fiber reinforcement for added strength.
Non-toxic water-based product is solvent free and is suitable for residential use.
Temperature: 35F to 110F (1.7C to 44C)
Application Method: Brush, putty knife, caulk gun

Description

Application: Temperature: 35F to 110F (1.7C to 44C) ; Method: Brush, putty knife, caulk gun ; Preparation: Surface must be dry and free of dirt, oil, and grease. ; Rate: Apply at joints and fasteners to 20-mil-thick wet film ; Clean Up Wet: Soap and water ; Clean Up Dry: UN-TACKTM or Solvent(Use safe handling practices) ; Painting: Only latex or epoxy paints Technical Data: Color: Gray ; Consistency: Smooth creamy texture ; Base: Synthetic latex ; Solvent: Water ; Weight per Gallon: 10.6 lbs. ; Solids Content: 65% ; Viscosity: Thixotropic ; Coverage Per gal.:Up to 320 lin. ft. at 3" width, 20-mil thickness ; Shore A Hardness: >20 ; Flexibility: Passes 1/4 in. mandrel bend ; Time to Test: 48 hours* ; Service Temperature: -20F to 200F ; Weather Resistance: Weather resistant ; Mildew Resistance: Mold & mildew resistant ; VOC: Exempt: 0 g/l, Non-Exempt: 93 g/l (less water) ; Pressure Classes: SMACNA 1/2, 1, 2, 3, 4, 6 and 10 inches w.g. ; Seal Class: Meets Seal Class A ; Freeze/Thaw Stability: Passed 5 Cycles *May vary according to temperature and humidity