Insulfrax® 1300 HT | Alkaline earth silicate fibre mats

Represent the next generation of LBP high-temperature wool insulation materials (Low Bio Persistent) from Unifrax.

1300°C Classification Temp.
Alcaline Earth Silicate fiber
Mat (blanket)
Thickness (mm)
13mm | 19mm | 25mm | 38mm | 50mm
Density / volume weight (kg / m³)
96 kg / m³ | 128 kg / m³ | 60 kg / m³

Refractory Refractory

Subcategory: Fiber blankets

Tags: Mat (blanket)


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    Insulation properties

    Exceptional insulation properties.

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    Temperature resistance

    High temperature resistance up to 1300 ° C.

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    Temperature change

    High resistance to temperature changes.


    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 or without magnesium oxide (MgO). The fiber can be obtained by refining with other additives or a change in the material mix (addition of zirconium oxide (ZrO2) have a temperature resistance of up to 1260 ° C.


    Unifrax® is one of the world's leading manufacturers of high-performance specialty fibers and inorganic materials that are used in industry, the automotive sector and fire protection. Our goals, philosophy and values build on our efforts to manufacture high quality products that help our customers save energy, reduce pollution and improve fire protection.

    Fiberfrax Durablanket® S | Ceramic Fiber Mats

    Product Variations

    Cerablanket™ | Ceramic Fibre Mats

    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.

    Cerablanket™ | Ceramic Fibre Mats


    We manufacture molded parts according to your specifications. The roll goods are shaped via:

    • Water jets
    • Punching
    • Plotting
    Cerablanket™ | Ceramic Fibre Mats

    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

    SiO2 72,0 - 78,0 %
    CaO + MgO 21,0 - 27,0 %
    Others < 3,0 %

    Physical Properties

    Colour White
    Classification Temperature (°C) 1300
    Operating Temperature (°C) 1200
    Medium fiber diameter (My) 3,6

    linear shrinkage (% after 24h)

    1300 °C 3,4
    Density 96 kg/m³ 128 kg/m³ 160 kg/m³
    Thermal conductivity at
    200°C 0,07 W/m°K 0,06 W/m°K 0,06 W/m°K
    400°C 0,11 W/m°K 0,10 W/m°K 0,09 W/m°K
    600°C 0,17 W/m°K 0,16 W/m°K 0,15 W/m°K
    800°C 0,26 W/m°K 0,23 W/m°K 0,21 W/m°K
    1000°C 0,36 W/m°K 0,31 W/m°K 0,29 W/m°K
    1200°C 0,56 W/m°K 0,49 W/m°K 0,45 W/m°K
    Tensile strength (kPa) 44 58 62


    Insulfrax® 1300 HT mats represent the next generation of LBP high-temperature wool insulation materials (Low Bio Persistent) from Unifrax. This new innovative product combines excellent thermal insulation with increased application temperature. The needled Insulfrax 1300 HT mat is manufactured using our unique know-how in proven technology and offers both a classification temperature of 1300 ° C and an application limit temperature of 1200 ° C. Insulfrax 1300 HT mats are made from alkaline earth silicate wool (AES) and can be effective solutions for a variety of applications over a wide range of temperatures. Insulfrax 1300 HT mats are completely inorganic, binder-free and therefore retain their strength, flexibility and thermal properties in numerous applications without any occurrence of smoke or steam.


    • High temperature resistance (up to 1300 °C)
    • Low thermal conductivity
    • Good thermal shock resistance
    • High tensile strength and elasticity
    • Light weight
    • Excellent flexibility
    • Low heat storage
  • Downloads

    Datasheet Insulfrax® 1300 HT

    Product properties, typical applications and availabilities.


    Hoffmann product catalog

    Refractory | Seals | Foundry supplies | Conveyor chains | Chesterton


  • K. Hoffmann GmbH

    K. Hoffmann GmbH

    Since 1986, K. Hoffmann GmbH has been at home as a production company in the high-temperature sector. Specializing in vermiculite as the main material, we offer board products and shaped parts as mass-produced and cost-oriented quality goods, as well as complex custom-made products for industrial and home use for thermal insulation and fire protection technology!

    As part of the SENN Group, we have access to a broad network of specialized companies and their associated experience and products, enabling us to meet every requirement!


ATTENTION - Sale to professionals only

K. Hoffmann GmbH

Your specialist for vermiculite, refractory and high-temperature resistant insulation solutions.

© K. Hoffmann GmbH

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