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Calcium Silicate Board is a large-sized material which has superior thermal insulation and workability (processability)  compared to insulating firebricks.

Two types of boards available:

■Silica Board for 650°C

■Super Board, Super Board L, Super Board H for 1000°C

Super Board  : Standard  Super Board L : Lightweight

Super Board H : Mechanically strong


Heat Resistance

Long and reliable service life within the maximum operating temperature.


Improved work efficiency due to good workability and light weight.

Thermal Insulation and Energy Saving

  • Comperably lower thermal conductivity than that of insulating bricks. High thermal insulation properties allow the reduction of furnace wall thickness.


  • If the furnace wall thickness is kept the same, the amount of heat-loss can be further reduced, resulting in energy savings, while also lowering the cold face temperature.


  • Its bulk density is lower than that of insulating bricks. The low bulk density helps reduce the amount of thermal energy stored in the furnace materials.


  • Lowered thermal capacity is expected to reduce the amount of energy required to raise the furnace temperature.


Depending on the application, the following products are also available: surface-water-repellent products and  overall-water-repellent products (Super Board and Super Board L).

Product Name Silica Board Super Board Super Board L Super Board H
Max. Service Temperature (°C) 650 1000 1000 1000
Bulk Density (kg/m³) 150 170 130 300
Modulus of Rupture MPa (kgf/cm²) 0.52 0.67 0.49 2.5
Linear Change (%)
after firing at ( )°C×3h
Thermal Conductivity (W/(mK)) JIS R 2616 at 100°C 0.052 0.053 0.051 at 30°C  0.053
at 200°C 0.058 0.059 0.058
at 300°C 0.069 0.068 0.07
at 400°C 0.086 0.081 0.086
at 500°C 0.101 0.097 0.107


Data shown are typical values obtained in accordance with accepted test methods.
They are provided for your reference only and are subject to change without notice. 



Branch Office: Overseas Department,
Tokyo, Osaka, Nagoya, Kyushu

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