Foamfrax® Grade III fibre (1649 °C polycrystalline mullite fibre)

Foamfrax® Insulation is a monolithic insulation system developed by Unifrax. Foamfrax Insulation is a three-component system of specially conditioned bulk ceramic or alkaline earth silicate (AES) fibres, an inorganic binder and an organic foaming binder.

The Foamfrax installation process combines the bulk fibre material with the inorganic and organic binders in a patented mixing mechanism. Within the mixing chamber, the fibres and binders are combined to create a homogeneous foam/fibre mixture. The Foamfrax installation machinery propels this mixture through a feed hose and nozzle, and the material is then gunned onto the target surface. The proprietary Foamfrax binder system and patented installation method completely encapsulate the fibres with the foaming binder, significantly reducing airborne fibre levels during installation. Foamfrax Grade II insulation fibre is a 1649 °C refractory ceramic fibre.

Foamfrax Insulation has the following outstanding characteristics:

  • Speed and ease of installation
  • Low rebound during installation
  • Low thermal conductivity
  • Low thermal shrinkage
  • Low heat storage
  • Excellent thermal shock resistance
  • Good chemical resistance
  • Excellent sound absorption

Typical applications:

  • Furnace linings (reformers, boilers, kilns, heat treating furnaces etc.)
  • Vessel linings
  • Incinerators, flues, ducts and stacks
  • Furnace refractory upgrades
    • Lining over Refractory (LOR)
    • Fibre over Fibre (FOF)
  • Low-mass kiln car decks
  • Ladle preheat stands
  • Backup for high-density gunned refractories
  • Boiler tube wall insulation
  • Furnace lining maintenance (gunning gaps, cracks and voids)
  • Fire protection


Safety Data Sheets

Foamfrax® Grade III fibre (1649 °C polycrystalline mullite fibre)

Product Information Sheet

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