Geocel Firex 921 High Performance Elastomeric Intumescent Expansion Joint Sealant

Geocel & DOWSIL™ Technologies for fire-rated applications
MS Polymer

Firex® 921 is a high performance elastomeric intumescent internal wall sealant. It is suitable for sealing internal wall joints in public buildings, sports stadia, hospitals, schools, hotels, factories, offices, railway and airport terminals and off-shore structures. For high temperature (up to 200 degrees celcius) sealing/bonding applications.

Product info


  • Swells at high temperature (250°C) to give a fire and smoke resistant seal
  • 4 hour fire rating
  • Overpaintable
  • High movement accommodation
  • Resistant to UV Light
  • Elastomeric intumescent seal
  • Conforms to BS476 Part 20 :1987 and BS ISO 11600-F-25HM




Technical Information

Where to use Interior/Exterior
Paintable Yes
Skin Overtime 30 to 35 minutes at 23°C and 50% relative humidity
Time to cure 24 hours
Time to cure disclaimer Cure rate is 3 mm per 24 hours at 23°C and 50% relative humidity
Container Type Sausage
Shelf life 12 month
Sizes 600ml ‘e’ Sausages
Application method Sausage Gun


Application Instructions

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Quantity Estimator

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