3M™ Fire Barrier Mortar

Lightweight, endothermic firestop that is ready for mixing with potable water. Firestops penetrations passing through fire-rated floor or wall assemblies.*

  • Up to 3-hour fire ratings per ASTM E 814 (UL 1479)
  • Variable mix ratio permits self-leveling as well as trowelable application consistencies
  • UL listed systems (including concrete floors with 2-1/2 in. minimum thickness)
  • Excellent adhesion — bonds to concrete, metals, wood, plastic and cable jacketing
  • Re-enterable/repairable with common trade tools
  • Acts as a heat sink, reducing the likelihood of combustible matter igniting on the unexposed side of the assembly
  • Dry mix available in 5 gallon (28 lbs.) pails and 44 pound bags
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