MMTCL’s three grades of high temperature insulation fibres are:


Low Biopersistent Fibres

 Superwool® Plus – Classification temperature 1200°C (2192°F)

Superwool HT – Classification temperature 1300°C (2372°F)

Superwool XTRA – Classification temperature 1450°C (2600°F)


Refractory Ceramic Fibres

 Kaowool® – Classification temperature 1260°C (2300°F)

Cerablanket® – Classification temperature 1315°C (2400°F)

Cerachem® – Classification temperature 1426°C (2600°F)

Cerachrome® – Classification temperature 1426°C (2600°F)


Polycrystalline Wool Fibres

Denka® Alcen® * – Classification temperature 1600°C (2912°F)

* Denka and Alcen are registered trademarks of Denka Kagaku Kogyo Kabushiki Kaisha used under licence by Morgan Advance Material PLC.

Superwool fibre is a high-temperature insulating wool composed of man-made vitreous silicate fibres. Each fibre grade features its own unique attributes and benefits to meet the demands of your application. The low biopersistent, alkaline earth silicate and potassium aluminosilicate, marketed as Superwool insulating fibres have been engineered to offer advantages in high temperature insulation applications.

Traditional Refractory Ceramic Fibre (RCF) is a highly versatile material. It can be spun or blown into the product forms as seen in the table.

The polycrystalline fibres (PCW) are made from high alumina (>95% alumina) or mullite fibres (85% alumina) using the Sol-Gel process. These fibre solutions are ideally suited for many challenging atmospheres and feature a temperature rating up to 1600°C (2912°F) with very low linear shrinkage and excellent resistance to alkali and chemical attack

Superwool® XTRA™

delivers the strength that industrial applications need, both in terms of its resistance to high temperatures and pollutants, but also its improved EHS credentials



Refractory blankets are available in roll form in a wide variety of densities and thicknesses. All blankets are made from long refractory fibers, binder free and are needled.

They have excellent strength before and after heating. All blankets have excellent chemical resistance unaffected by all chemicals except hydrofluoric acids and strong alkalies. .

Refractory Fiber Blankets


  • Furnace and Kiln linings
  • Boiler insulations
  • Reformer and heat lining
  • Coke oven hot repair
  • Expansion gap
  • Duct and Pipe linings
  • Thermal barriers for automotive industry
  • Die cut shapes for automobiles
  • Steam and gas turbine insulation


  • Excellent insulating performance
  • Excellent thermal stability
  • Low heat storage
  • Resistance to thermal shock
  • Good sound absorption


  • Cerawool : 1200 ° C
  • Cera Blanket : 1260° C
  • Cerachem Blanket : 1425° C

The Maximum use temperature depends on the application. In case of doubt, refer to MMTCL Technical service for advice.



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 manufacturer to obtain current information.




Kaowool 1260 & 1400 Paper are manufactured from high purity refractory fibres and designed for high temperature insulation.

Advanced production techniques ensure uniform fibre distribution and close control of thickness and density. Kaowool Paper are produced from Alumina Silicate (Alumina Silicate Zirconia fibres in case of 1400 paper) fibres with the minimum addition of carefully selected bonds, which burn out cleanly in service.


Refractory Ceramic Fibre Paper


  • Insulating thermal break
  • Insulating gaskets
  • Expansion joints
  • Parting media
  • Die cut gaskets for domestic appliances
  • Thermal barriers for vehicles (silencers, catalytic exausts and heat shields)
  • Fire protection
  • Glassware Separator/Parting agent
  • Glass Sagger mold linings


  • Excellent insulating performance
  • Excellent thermal stability
  • Low heat storage
  • Resistance to thermal shock
  • Good sound absorption


1260, 1400 DC. The maximum continuous use temperature depends on the application. In case of doubt, refer to your local Murugappa Morgan hermal Ceramics representative for advice.



High strength boards based on refractory fibers



  • Backup insulation in steel ladles Like Tundish & Torpedo ladles
  • Rotary Kiln back up of Calcining and Dolomite Kilns
  • Used as back up to feeder channels of glass tanks.
  • Excellent Non – wettability to molten Aluminum and ideally suited for various molten metal contact applications such as Launders, Header Box, Troughs and Hot top Moulds etc



  • Very high strength
  • Excellent machinability
  • Low shrinkage
  • Non – Wetting to molten Aluminum andother non – ferrous metals



  • HS 45 : 1260 °C
  • SS 800 : 1260 °C
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