Firestopping mastic sealant



Intusil is a modified low modulus silicon that is designed for use in external aggressive environments or in high movement building joints. It has high adhesion and is suitable for high sheen surfaces such as glass and aluminium.

Intusil cannot be readily over-coated.


  • œWater resistant seal
  • œUnaffected by moisture
  • œFully tested for up to 240 minutes integrity and insulation
  • œAvailable in easy to handle light weight tubes/foil sausages
  • œCures at a rate of 1 mm per day

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