Superwool® Xtra | Alkaline earth silicate fibre mats


Earth alkaline silicate fiber


Mat (blanket)


SKU: N/A Category:

Insulation properties

Exceptional insulation properties.

Temperature resistance

High temperature resistance up to 1450 °C.

Temperature change

High resistance to temperature changes.


Superwool® XTRA Blanket is made of Superwool® XTRA long fibres. It has excellent insulation properties at elevated temperatures. Superwool® XTRA Blanket has excellent thermal stability and retains its original soft fibre structure up to the maximum continuous use temperature. The Blanket does not contain binders or lubricants and does not emit smoke or odor during the first fire. Smoke or odor during the first firing. It is flexible, easy to cut and shape, and easy to install. Superwool® XTRA has a low shot content, typically 35-37 %, and a high fiber index, typically 63-65%.

Superwool® XTRA Blanket has excellent thermal insulation properties, is exempt from any carcinogenic classification according to Nota Q of Directive 97/69EC (certificate available on request), does not form crystalline silica at high temperatures. The high coefficient of thermal expansion, counteracts shrinkage in service and has high resistance to erosion when used in stacking modules; no damage up to 50 m/sec at 1250°C.


  • Excellent thermal insulation properties
  • No carcinogenic classification (Nota Q Directive 97/69EC)
  • No crystalline silica at high temperatures
  • Resistance to chemicals and pollutants
  • Coefficient of thermal expansion
  • Excellent thermal stability over time
  • Low heat storage
  • Insensitive to temperature shocks
  • Good resistance to tearing
  • Flexible and resistant
  • Resistant to water and steam
  • Good sound absorption
  • Free of binder or lubricant


Mats (blankets) made of high temperature wool are needled lightweight mats made of biosoluble (AES) high temperature wool (HTW) and provide an effective solution for a wide range of thermal insulation applications. They are characterized by excellent insulating properties, high resistance to chemicals, elasticity and dimensional stability. They are exclusively inorganic and therefore do not generate smoke or fumes when exposed to heat. They are available in a wide range of densities and thickness combinations, making them one of the most versatile product groups on the market.


Alkaline earth silicate fiber high temperature wool (AES Alkaline Earth Silicate Wool) consist of a mix of amorphous fibers, which are melted and then rapidly solidified using a combination of silica SiO2 and calcium oxide (CaO) with magnesium oxide (MgO) can be produced.


Ceramic and glass industry

  • Float glass preheating and start-up hoods
  • Glass casting moulds
  • Tunnel kiln expansion joints
  • Bogie hearth furnace for sanitary ceramics: roof and wall insulation
  • Roller hearth furnaces: back lining, roller fillings and expansion joints
  • Applications in automotive glazing systems

Metal industry

  • Annealing furnace doors
  • Insulation of ladle side gates
  • General thermal insulation
  • Repairs of coke ovens
  • Reheating furnace lining
  • Lining of melting/holding furnace doors
  • Manifold cover and slide
  • Jacket pipe seal

Consumer goods industry

  • Chimney insulation gas fireplaces
  • insulation of oven casings
  • Insulation for boilers and water heaters

Morgan Thermal Ceramics

Morgan's development of low biopersistence fibers has led to a revolution in the use of fibers for high temperature insulation applications over the last 20 years. Our patented Superwool products, manufactured using ISO 9002 certified processes, are made from alkaline earth silicate (AES) composition fibers uniquely engineered to provide benefits in high temperature insulation applications.

Morgan Thermal Ceramics Advanced Materials

Product variations


Roll goods

Fiber mats are sold as roll goods as standard. The roll length depends on the selected thickness. As a standard width, we have 610mm wide rolls from stock. Double widths are available on request.



We manufacture molded parts according to your specifications. The roll goods are made using

  • Water jet
  • Punching
  • Plotting

brought into the right shape for you.


Fiber modules

We manufacture fiber modules according to customer specifications that are designed for the insulation requirements of industrial ovens, kilns and heating devices.


Chemical Analysis 
Al2O3 32,0 – 38,0
SiO2 27,0 – 33,0
K2O 23,0 – 28,0
ZrO2 5,0 – 9,0
MgO 0,5 – 1,5
Other oxides: < 0,5


Physical Properties
colour White
Classification temperature (°C) 1450
Melting point (° C) 1650


Permanent linear shrinkage (%) after 24 hours
1450 °C < 4

Volume weight (kg / m³) 96 128 160
Thermal conductivity (W / mK)
200 ° C 0,07 0,07 0,06
400 ° C 0,11 0,10 0,09
600 ° C 0,18 0,16 0,14
800 ° C 0,30 0,27 0,23
1000 ° C 0,46 0,42 0,34
1200 ° C 0,67 0,60 0,49
Tensile strength (kPa) > 45 > 70 > 90



Data sheet Superwool® Xtra Blanket

Product properties, typical applications and availabilities.

KS Technologie product catalog

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