BOSS® 388

100% RTV Sealant

BOSS® 388 is a neutral / weather proof silicone sealant is an one part neutral cure, high modulus, low odor, construction grade sealant that offers excellent adhesion, weatherability and compatibility with wide variety of materials. BOSS® 388 is ideally suited for weather proofing, waterproofing, sealing and general purpose glazing.


  • Provides a tough rubbery seal to resist UV, weather, water and temperature.

  • Remains flexible even in extreme atmospheric conditions.





  • Technical Data Sheet

    &nbp  Typical Applications