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FS-One MAX Fire Stop Sealant 300-ml


Part # 2101534

Hilti FS-ONE High Performance Intumescent Firestop Sealant. In-tumescent (expands when exposed to fire) fire stop sealant that helps protect combustible and non-combustible penetrations for up to 4 hours fire rating.


Product Features

  • Smoke, gas and water resistant after material has cured
  • Contains no halogen, solvents or asbestos
  • High fire rating properties
  • Water based, easy to clean
  • Protects most typical firestop penetration applications
  • Paintable
  • Single component systems available
  • Meets LEED™ requirements for indoor environmental quality credit 4.1 Low Emitting Materials, Sealants and Adhesives and 4.2 Paints and Coatings

Areas of application

  • Steel, copper and EMT pipes
  • Insulated steel and copper pipes
  • Cable bundles
  • Closed or vented plastic pipes
  • HVAC penetrations

For use with

  • Concrete, masonry, drywall and wood floor assemblies
  • Wall and floor assemblies rated up to 4 hours


  • Chemical basis: Water-based intumescent acrylic dispersion
  • Color Red
  • Application temperature 40°F to 104°F (5°C to 40°C)
  • Skin forming time Approx. 20-30 min.
  • Curing time Approx. 2 mm / 3 days
  • Average volume shrinkage (ASTM C1241) 24.1%
  • Movement capability Approx. 5%
  • Expansion rate (unrestricted) Up to 3-5 times original volume
  • Temperature resistance (cured) –40°F to 212°F (–40°C to 100°C)
  • Surface burning characteristics (ASTM E 84-96): Flame Spread: 0, Smoke Development: 5
  • Sound transmission classification (ASTM E 90-99): 56 (Relates to specific construction)
  • Tested in accordance with • UL 1479 • ASTM E 814 • ASTM E 84 • ASTM G21 • CAN/ULC-S115 *At 73°F (23°C) and 50% relative humidity