BOSS® FIRE STOP

Silicone Sealant

BOSS® FIRE STOP is a non-combustible filler caulking used for fireblock applications in the annular space around wires, pipes, ducts, vents, cable lines and other penetrations to the building envelope. It is a non-slumping sealant that sets to form a hard surface.


  • Provides flexible seal joints that can experience dynamic movements.

  • Up to 2 hrs fire rating.

  • Intumescent and non-intumuscent.

  • Easy to install.

  • Effective protection against conventional method.

  • Tested to ASTM E-814(UL 1479).

  • UL certified.


  • Technical Data Sheet

        Typical Applications