superwool ® HT fiber blanket



Superwool HT Blanket is made of Superwool HT long fibres. It exhibits outstanding insulating properties at elevated temperatures. Superwool HT Blanket has an excellent thermal stability and retains its original soft fibrous structure up to maximum continuous use temperature.
Blanket contains neither binder nor lubricant and does not emit any fume or smell during the first firing. It is flexible, easy to cut and shape and easy to install.


Blanket made from high temperature insulation wool.


  • Raw material for the manufacture of finished products such as Boards, Shapes, Paper & Yarn

  • Expansion joints, Patching and emergency repair in furnaces, boilers, heaters etc

  • Loose insulating fill for crowns, walls of kilns and furnaces

  • Packing material for temporary of insulation

  • Precursor for engineered fibers


  • Excellent thermal insulating performances
  • Free of binder or lubricant
  • Thermal stability
  • Low heat storage
  • Flexible and resilient
  • Immune to thermal shock
  • No reaction with alumina based bricks in application in the range of the typical use temperature
  • Exonerated from any carcinogenic classification under nota Q of directive 97/69 EC


1300°C (ENV 1094-3)


Superwool HT  
Continuous Use Temperature, °C (°F)1150 (2102)
Classification Temperature, °C (°F)1300 (2372)
Density, kg/m3 (pcf)64, 96, 128, 160 (4, 6, 8, 10)
Tensile Strength, kPa (psi), EN 1094-1
Measured Density,kg/m3 (pcf), 64 (4)30
80 (5)-
96 (6)50
128 (8)90
160 (10)95
Chemical Analysis, % weight basis after firing
Silica, SiO270-80
Calcium oxide + Magnesium oxide, CaO + MgO18-25
Thermal Conductivity, W/m•K (BTU•in/hr•ft2), per ASTM C201
Measured Density,kg/m3 (pcf)96 (6)128 (8)
200°C (392°F)0.05 (0.35)0.04 (0.28)
400°C (752°F)0.10 (0.69)0.08 (0.55)
600°C (1112°F)0.19 (1.32)0.14 (0.97)
800°C (1472°F)0.32 (2.22)0.23 (1.59)
1000°C (1832°F)0.48 (3.33)0.34 (2.36)
1200°C (2192°F)0.69 (4.79)0.48 (3.33)

The values given herein are typical values obtained in accordance with accepted test methods and are subject to normal manufacturing variations.
They are supplied as a technical service and are subject to change without notice. Therefore, the data contained herein should not be used for specification purposes.
Check with your Thermal Ceramics office to obtain current information

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