Product range

Acrylic Fire Sealant For Internal Use Around Combustible Services


Intumastic HP FS709 is a fire barrier for internal use, made of aqueous acrylic and containing inert fillers and graphite. Suitable for up to diameter 125 mm combustible pipe seals, up to 60 mm insulation wall thickness, 60 mm annular space around cables or large preformed slots in walls floors forming cable tray/ basket openings. Intumastic HP (FS709) provides integrity and insulation of up to 240 min.

Read more
Make Product Inquiry
products benefits:

Tested for use in double partition walls both insulated and non-insulated

Low smoke and non-hazardous

Suitable for walls and floor

Fully tested to four hours of fire protection

Tech info:

  • Specific Gravity


  • Viscosity


  • Application Temperature

    +5°C to 35°C

  • Flash Point

    +5°C to 35°C

  • Tack Free Time

    60 - 120 minutes depending on temperature & humidity

  • Period of Fire Resistance

    BS EN 1366-3/4 - up to 4 hours

  • Service Temperature Range

    -25°C to +70°C

  • Colour


  • Full Information:

    Check out the full
    datasheet available in
    the Downloads section!

More Info


An intumescent pressure exerting mastic used to fire seal combustible pipework up to 125 mm diameter and for sealing around cable trays, cables and within cast in plastic or steel conduits or around Insulation whilst providing up to two hours fire protection when installed within drywall. NOTE: If used around Pegler X-Press Carbon Steel pipes, the pipe manufacturer should be consulted, and their recommendations followed.