FlameSafe FS-900 Water Based Elastomeric Firestop Sealant
Manufacturer RectorSeal Fire Stopping Products
SKU: FlameSafeFS900
FlameSafe FS-900 Water Based Elastomeric Firestop Sealant

FlameSafe® FS 900+ Sealant is cost-effective, water-based and cures to form a flexible shield against the spread of fire and smoke. It is available in two grades: caulkable and trowelable (CG) and self-leveling (SL).

FS900+ Sealant does not contain solvents and will not damage plastic pipe or cable jackets.  FlameSafe FS900+ cures to form a flexible shield.  In the event of a fire, it will prevent the spread of flames and smoke through construction joint openings in fire-rated assemblies or for joints between fire-rated assemblies.  This fire-rated sealant is versatile, yet and economical solution for a wide range of through-penetration and joint construction conditions. 


  • Metallic and non-metallic Pipes
  • Cable Penetrations
  • HVAC Penetrations
  • Concrete Floor to Floor
  • Floor to Wall
  • Wall to Wall Applications
  • CMU and Gypsum head of wall application requiring dynamic joint movement


  • UL Classified
  • Factory Mutal approved
  • Firestop systmes listed for throguh-penetration and joint systems
  • Excellent adhesion 
  • Easy clean up
  • Elastomeric
  • Mold and Mildiew Resistance
  • Sound Transmission tested with a rating of STC rating 62
  • Easy to Apply
  • No solvents, silicones or outgassing

Recommend For

  • Metal, insulated, fiberglass, and plastic pipes, cable and HVAC penetrations
  • Concrete floor-to-floor, floor-to-wall and wall-to-wall
  • Concrete
  • CMU and gypsum head of wall applications requiring dymanic movement

Apply with

  • Caulking Gun
  • Bulk Loading Gun
  • Trowel
  • Pumping Equipment
  • No Mixing Required

FS 900+ | Product Information

Product Code Size Quantity Per Case
10.3 oz Cartridge
20.2 Foil Pack
31 oz. Cartridge (Red)
5 Gal. Caulkable Pail (Red)
5 Gal. Caulkable Pail (Gray)

Additional Product Literature
Data Sheet