BOSS® 389+

Silicone Sealant

BOSS® 389+ weather seal slicone sealant is an one part neutral cure, medium modulus, low odor,construction grade sealant that offers excellent adhesion, weatherability and compatibility with wide variety of materials. BOSS® 389+ is ideally suited for weather proofing, waterproofing, sealing, expansion & control joints and general purpose glazing.


  • Excellent adhesion to most common building materials.

  • Non-Corrosive to metal, permanently flexible.

  • Weatherproof, Waterproof, UV resistant.




  • Technical Data Sheet

       Typical Applications