Armil CFS offers several alternatives to traditional ceramic fiber materials. Insulfrax® and Isofrax® are low biopersistence insulation materials that meet European regulatory requirements (Directive 97/69/EC) for man-made vitreous fibers.

Insulfrax is based on calcium, magnesium, silica chemistry and is capable of continuous operation to 2012°F. Insulfrax fiber chemistry has been combined with Unifrax’s proprietary fiber spinning technology to create Insulfrax S blanket, a high temperature bio-soluble blanket with excellent thermal and mechanical properties. Insulfrax S blankets offers both low thermal conductivity and excellent resistance to thermal shock. Insulfrax S blanket exhibits no smoke generation or outgassing while in service. Insulfrax blankets are needled to provide good handling strength. Insulfrax Papers, Boards, and Vacuum formed shapes are also available.

Isofrax is based on a unique patented silica-magnesia chemistry and is capable of withstanding continuous operating temperatures to 2300°F. Isofrax blankets are also needled to provide good handling strength. Isofrax meets European regulatory requirements. Isofrax products exhibit low thermal conductivity, excellent thermal stability and thermal shock resistance. Blankets, Modules, Papers, and Boards are available.

Read Blanket Specifications (PDF)

Isofrax® and Insulfrax® Board

Isofrax® boards and shapes are vacuum formed from high temperature silica-magnesia fibers and binders. Insulfrax® boards and shapes are vacuum formed from form calcium, magnesium, silica fibers and binders. Both products do not contain RCF fibers. The physical properties of these items offer high temperature stability, uniform density, low thermal conductivity, excellent resistance to thermal shock, and superior wetting resistance to molten aluminum. Both products contain organic and inorganic binders that will burn out during initial heat up.

Read Board Specifications (PDF)

Typical applications for Insulfrax and Isofrax products:

  • Hot face and backup insulation in ceramic kilns
  • Hearth products
  • Stack and chimney insulation
  • Metals processing including stress relieving blankets, seals, and gaskets
  • Petrochemical/Power such as reusable insulating pads and duct insulation
  • Expansion joints in high temperature linings
  • Fire protection