Fireseal Granulated

Fireseal Granulated is a specially designed insulation material for fire protection of small voids where linings are to provide fire resistance. Fireseal granulated is an even finer ground product suitable for smaller voides that requrie fire protection.

Fireseal Granulated is an insulation material formulated to provide fire protection. Fireseal Granulated is manufactured from a molten mixture of natural rock and recycled blast furnace waste products. The product is un-bonded to enable convenient installation. The product is ground to create a finer mix that is easier to fill voids with. The product has remarkable resistance to shrinkage at temperatures encountered in fire conditions. This stability is well beyond that of normal Rockwool or fibreglass materials. The product can be identified by its dark brown appearance.


Fireseal Granulated provides a convenient low cost ‘plugging’ for filling gaps in fire protective walls and floors where penetrations are necessary for ductwork and other services. It is especially useful for irregularly shaped penetrations. CSIRO opinions supporting its use in fire rated structures are available.

Features and Benefits

  • Highly durable insulation product
  • Remarkable resistance to shrinkage at high temperatures encountered in fire conditions
  • Can be easily installed into cavities and holes where full pieces may not be practically installed
  • Finely ground to fill into smaller voids and gaps that require fire protection
  • Cost effective fire insulation
  • Performance is not adversely effected from contact with water
  • Non combustible
  • Biosoluble safe to use product
  • Made from up to 40% recycled material


Product is supplied in 12.5 kg bags.