Boss 814 Firestop Intumescent Latex Caulk

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Price: $11.99
Unit Of Measure:
10.1 oz Tube

BOSS 814 UL Classified Intumescent Latex Firestop Sealant is a one part, elastomeric, intumescent firestop sealant that expands when exposed to fire or extreme heat, forming an insulated char. This fire resistant caulk will prevent the spread of toxic gases, smoke and fire. BOSS® 814 is suitable for adhesion to almost any surface and remains flexible, making it ideal for both horizontal and vertical joints, subject to vibration or dynamic movement. BOSS 814 latex caulk can be used for interior or exterior applications, and can be painted (after inspection). BOSS 814 has been tested to ASTM E-814 (UL 1479) and meets the criteria for fire/smoke/draft stop for BOCA – CABO – UBC – SBCCI – IRC – IBC.


  • Interior/exterior use on virtually any surface
  • Remains flexible
  • VOC compliant
  • Excellent freeze/thaw properties
  • Safe to use and handle
  • Water clean-up
  • Apply using a standard caulk gun

 Boss 814 Firestop Datasheet

Unit Of Measure:
10.1 oz Tube

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