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This revolutionary family of high purity fused silica products from Rex Materials is based on a unique technology and manufacturing process which permits the cost-effective production of shapes to meet most design and application requirements.  products and technology permit us to supply customers with a wide range of precision-made shapes small and intricate to extremely large shapes, and shapes with complex internal structures - which do not require costly additional machining. 

FUSIO2N (Fusion) shapes are fused silica (95%+) that are sintered to a high temperature. Today they are used in many non-ferrous applications, including by not limited to:

  • Thimbles
  • Control Pins and Spouts
  • Troughs and Launder Liners
  • Filter Bowls
  • Ladles and Pour Basins
  • Stopper Rods and Nozzles
  • Dams
  • Tap Blocks
  • Back Up Insulation 
  • Cements

Rex Materials ability to supply quality shapes cost-effectively enables you to use  parts in applications where ordinarily fused silica products have been too expensive.



  • Low coefficient of thermal expansion
  • Excellent thermal shock resistance & volume stability
  • Low thermal conductivity
  • Excellent thermal insulator (energy savings)
  • Chemical inertness (except to hydrofluoric acid)
  • Resists corrosion, long life
  • Reflects infrared radiation
  • Energy saving
  • Low dielectric constant
  • Non-conducting
  • Unique cast technology
  • Cost effective large and complicated shapes at various densities

Products Available:        Technical Data

  • Fusion SS: Standard PFS mix - 106 pcf (1.7 gm/cm³), 98% SiO2
  • Fusion SL: Non-Wetting PFS mix 106 pcf (1.7 gm/cm³), 93% SiO2
  • Fusion SP: Fine grained non-wetting mix - 110 pcf (1.76 gm/cm³), 93% SiO2
  • Fusion Foam 50: An open cell pure fused silica foam which has excellent thermal insulation. Blocks available in sizes 12"x18"x4.5", 12"x18"x3", 12"x18"x2", 12"x18"x1". Special sizes and shapes upon request. 50 pcf (0.8 gm/cm³), 98% SiO2
  • Fusion CS Cement: A pure fused silica air setting cement. Used to bond both fused silica dense and foam shapes.
  • Fusion CL Cement: A fused silica air setting cement that is non-wetting to aluminum. Used to bond both fused silica dense and foam shapes.
Rex Materials, Inc.
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