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Nullifire FS702 Intumastic

Nullifire FS702 Intumastic 

Nullifire FS702 Intumastic is a one-part fire resistant acrylic joint sealant. Nullifire FS702 cures to give a firm, but flexible seal in low movement fire rated joints to seal between joints in Nullifire Intubatt FB750 Coated Fire Batts, substrate to penetration service applications and pointing up of penetration seals. Nullifire FS702 Sealant may be used to provide a linear joint or gap seal with specific supporting constructions and substrates and as a penetration seal.

• Masonry to masonry
• Masonry to timber
• Masonry to steel
• Nullifire Intubatt FB750 to flexible wall
• Nullifire Intubatt FB750 to rigid wall
• Flexible wall to flexible wall
• Flexible wall to rigid floor
• Rigid floor to rigid floor
• Rigid wall to rigid wall


  • Can achieve up to 4 hours joint fire resistance
  • Tested in accordance with EN 1366-4, EN1366-3 and BS476 Part 20-21
  • Ideal for sealing low movement joints - suitable for gaps up to 50 mm wide
  • Suitable for rigid and flexible walls
  • Up to 30% movement capability (during a fire test)
  • Used for sealing Nullifire Intubatt FB750 Coated Fire Batts
  • Acoustics up to 55 dB
  • Air seal up to 2000 Pa
  • Single sided seal tested
  • Optifire unique traceability identifier

Data Sheets

FS702 Intumastic Data Sheet

FS702 Safety Data Sheet

Extra Information