Self-Seal® SL-100 Self-Leveling Silicone Firestop is a single-component, low modulus, self-leveling silicone firestop sealant designed for floor applications. Its self-leveling property reduces labor costs (little or no tooling required) particularly around congested service penetrations assuring that all voids are sealed. It forms a pressure tight seal resistant to water, smoke and toxic gases, see Self-Seal®UL and cUL firestop systems for W (Water tightness) and L (Air Leakage) Ratings. The sealant is also resistant to cracking, ultraviolet radiation and ozone.



  • 100% Self-leveling Silicone.
  • Water resistant before, during, and after curing.
  • Freeze-thaw stable.
  • Protects your floor openings.
  • Tested at positive pressure to simulate the pressure differentials that can occur in a fire situation.

Typical Uses

  • Sealing service penetrations and expansion joints in fire and smoke rated floor separations.
  • Sealing around aluminum, pre-cast concrete and most exterior wall systems.
  • Sealing power / communication cables and aluminum / galvanized steel cable trays.
  • Sealing static / non-static pipes and conduits, Chlorinated Polyvinyl Chloride (CPVC) sprinkler pipe.
  • Steel, Polyvinyl Chloride (PVC) sleeving or cored concrete openings.


  • Moisture, heat and vibration resistant.
  • Will not run when exposed to rain or water.
  • Will not crack over time.
  • Remains flexible.
  • Withstands extreme temperatures.