BOSS® 393 Gutter-Seal

Recommended for sealing all types of gutters, downspouts, ducts and ventilators. Excellent for sealing seams, joints and cracks in gutter troughs, HVAC ducts and sheet metal. Cures on exposure to atmospheric moisture to form a durable watertight seal.

  • Permanent elastic seal
  • 4 inch nozzle for hard to reach areas
  • Guns as low as -40°F
  • No lasting odors
  • No Shrinkage
  • Non-flammable
  • Fast curing

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