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P E R F O R M A N C E   S I L I C O N E S   |   W O M A N   O W N E D

NovaFlex Gutter Seal is an encapsulating compound that cures even when wet and remains flexible for a permanent seal. The self-tooling Flowable is perfect for working into miters and corners.

It can be applied in wet and cold conditions, and will even cure when wet.

  • Excellent adhesion to most common building materials
  • Non-flammable
  • Extrudes down to -20°F
  • UV and mold/mildew resistant
  • Permanently flexible
  • All weather formula
  • Solvent free
  • Impervious to UV light
  • Tack free in less than 30 minutes; completely cured in 24-30 hours
  • Made in USA
  • Proposition 65
  • Sulphur Free
  • UV Resistant
  • VOC Compliant
How to Buy
  • Applications

    Gutter Seal is designed for use in sealing gutters, downspouts, underdecks, patio covers, carports, and rain carrying systems. We recommend for sealing and bonding around:

    • Vinyl-Clad Gutters
    • Aluminum Gutters
    • Galvanized Gutters
    • Steel Gutters
    • Metal Flashing
    • Metal Trim
    • Metal Awnings
    • Downspouts


    We do not recommend it for joints continuously submerged under water; areas needing paint or stain; spaces confined from atmospheric moisture during cure; on surfaces that might bleed oils, plasticizers, or solvents; in structural glazing applications; or painted applications.

  • Packaging and Lead Times
    This product is available in the following formats:
    • 10 ounce cartridge

    Lead times are:
    • 10 business days
  • Specifications
    • Product Specifications
      Appearance Viscosity Extrusion Rate
      1/8” Orifice @ 50 psi
      Skin Over Time
      3/8” @ 50% RH & 77°F
      Through Cure
      3/8” @ 50% RH & 77°F
      Fluid (Translucent, White, Gray, and Primer Gray) 700 – 2,500 poises (Brookfield #5 @ 10 rpm)
      500 – 1,800 poises (Brookfield #5 @ 20 rpm)
      -- 30 minutes maximum 24 – 30 hours
    • Typical Properties
      Slump (Flow) Specific Gravity Tensile Strength
      ASTM D412
      ASTM D412
      Tear Resistance
      ASTM D624
      Shore Hardness
      ASTM D2240
      Service Temperature Application Temperature Adhesion
      ASTM D903
      Peel Strength
      STM C974
      Green Strength
      ASTM C1135
      Joint Sealant Designation
      ASTM C920
      Paste Fluid 1.00 – 1.50 150 psi 500% -- 20 +/- 5 Shore A -40°F to 400°F (-40°C to 204°C) -20°F to 160°F (-29°C to 71°C) Glass: >15 pli Aluminum: >15 pli -- -- --
    • Industry Specifications
  • Videos

  • Downloads
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