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Duro Dyne – 21046 BTL316-58LG 3/16” x 5/8” Non-UL Butyl Gasket Light Gray 25' Roll (500' per Carton)

MFR: 021046

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Product Info


Duro Dyne – 21046 BTL316-58LG 3/16” x 5/8” Non-UL Butyl Gasket Light Gray 25ft. per Roll (500ft. per Carton)

Used to create a permanent seal in the flange system
  • Butyl gasket is a permanently soft caulking compound with a high percentage of virgin butyl rubber.
  • It will adhere to most dry, clean surfaces such as steel, aluminum, plastics, wood and concrete and can withstand movement without cracking.
  • Temperature range: -40°F to 249°F
  • Non-Corrosive
Warning: this product contains a chemical known to the State of California to cause cancer.


Weight45 Pounds (lbs)
Width10 Inches (In)
Height10.5 Inches (In)
Country of OriginUSA
Length20.5 Inches (In)
ApplicationUsed in tape and bead form to seal transverse duct connection systems helping to provide a moisture and air tight seal
BrandDuro Dyne
CompositionQuartz Silica, Calcium Carbonate, Hydrous Magnesium Silicates
For Use WithHVAC ductwork & accessories (corners & flanges)
FunctionsWill adhere to most clean, dry surfaces such as steel, galvanized steel, aluminum, plastic, wood and concrete
Prop 65Yes


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