331 Exterior Siding

NuFlex® 331 Exterior Siding & Trim Silicone Sealant is a primerless, non-corrosive 100% neutral cure silicone sealant that exhibits low modulus and high adhesive qualities when cured.NuFlex® 331 is a high-quality, readyto-use silicone that has a very high level of adhesion, especially to substrates such as PVC and other plastics which have typically shown difficulty with adhesion.NuFlex® 331 is unaffected by UV and airborne chemicals.

  • 100% Slilicone.
  • 100% RTV.
  • 50 year durability.
  • Ideal for exterior trim & siding.
  • Adheres to many porous substrates.
  • Utilized for multiple glazing applications where a clear, high-adhesion product is preferred.
  • Utilized as a primary seal/bedding compound; window installation (especially with wood finishes) vinyl siding; factory and field installed metal building systems; appliance manufacturing; aircraft and automotive glazing and manufacturing.
  • Permanently flexible.
  • Excellent bond to glass, aluminum and vinyl.
  • Moisture, heat and vibration resistant.
  • Multiple uses & adhesion capabilities.
  • 300 mL (10.1 fl.oz.) cartridge.
  • 12 cartridges per case.
  • 144 cases per skid (300 mL).
  • Available in larger sizes.*
  • Available colors include: clear, white, & black.
* Special order items may require lead times and minimum order quantities.