Flame Buster® Intumescent Latex Caulk


Water Clean-Up

White Lightning® FlameBuster™ Intumescent Latex Sealant is a one part, elastomeric, intumescent sealant that expands when exposed to fire or extreme heat, forming an insulated char. Flamebuster Intumescent Latex will prevent the spread of toxic gases, smoke and fire. It 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. Flamebuster Intumescent Latex can be used for interior or exterior applications, and can be painted (after inspection).

ducts, pipes, vents, wires


  • Expands to 5 times original volume (at 600°F)
  • Interior/exterior use
  • Remains flexible
  • Safe to handle
  • VOC compliant
  • Water clean-up


Meets ASTM E-814 (Ul 1479) and meets the criteria for fire/smoke/draft stop for CABO - UBC - SBCCI - IRC – IBC, This sealant was tested according to ASTM E90 to verify no performance loss for an STC 57 wall partition with 3/8” clear open slots.

SKU Listing
Product # Color Size Safety Data Sheet UPC
W44007010 Red 10.0 fl. oz. Download 023275850156
W44007020 Red 5 Gallon Download 023275851719
Product #1
Product # W44007010
Color Red
Size 10.0 fl. oz.
Safety Data Sheet Download
UPC 023275850156
Product #2
Product # W44007020
Color Red
Size 5 Gallon
Safety Data Sheet Download
UPC 023275851719