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BOSS Flexsil

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BOSS Flexsil

Download TDS File

BOSS® Flexsil silicone sealant is a one-part, acetoxy cure, adhesive sealant that is suitable for general construction sealing and adhesive applications. This product will adhere to clean metal, glass, many types of wood, silicone resins, vulcanized silicone rubber, and ceramics.


  • Ease of use, one-part sealant, no mixing required.
  • Good weather resistance.
  • The cured sealant also does not dry out or become brittle over time.
  • The cured sealant stays rubbery without tearing or cracking.
  • Wide temperature applicability.


  • All general sealing applications.
  • Ideally suited for sealing, glass windows, shopfront, aluminium joints, showcases, bus-body building, and automobile manufacturing.


This product is available in clear, white, and black.


Available in standard 260 ml caulking cartridges.

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