Ignition Barrier Coating

Part Number IB4

FIRESHELL® IB4 is a proprietary, water based, 1-part, non-flammable, intumescing coating complying with AC 377 ICC ES for interior use. This coating expands up to 2000% and provides oxygen starvation when in contact with fire. This barrier coating / ignition barrier comes in both insulating and fire extinguishing versions and is a non-toxic, drain safe, no fuming, water based coating.


  • Walls
  • Foams
  • Attics
  • Lumber


  • Approved Ignition Barrier over Foam
  • Complying with AC 377 APPENDIX: X
  • AQMD super compliant