Insulfrax® 1300 HT | Alkaline earth silicate fibre mats

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 KFT
Earth alkaline 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

Products Products

Category: Fiber blankets

Tags: Mat (blanket)


  • Insulation properties

    Exceptional insulation properties.

    Temperature resistance

    High temperature resistance up to 1300 ° C.

    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

    DOM insulating feeder

    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 

    SiO2: 72,0 – 78,0
    CaO + MgO: 21,0 – 27,0
    Other oxides: <3,0
    Physical Properties
    Colour: white
    Classification temperature (° C): * 1300
    Application limit temperature (° C): 1200
    Mean fiber diameter (μm) 3,6
    Permanent linear shrinkage (%) after 24 hours
    1300 °C: 3,4
    Volume weight (kg / m³) 96 128 160
    Thermal conductivity (W / mK)
    200°C 0,07 0,06 0,06
    400°C 0,11 0,10 0,09
    600°C 0,17 0,16 0,15
    800°C 0,26 0,23 0,21
    1000°C 0,36 0,31 0,29
    1200°C 0,56 0,49 0,45
    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.


  • KS Kneissl & Senn Technologie

    Gasser GmbH

    Gasser - Handel mit Gießerei- und Stahlwerksbedarf Gesellschaft m.b.H. has been active as a company since 1925. Over time, various commercial agencies and products produced under their own brand were added. Today, the company concentrates 100% on products for iron and non-iron foundries and manufacturers and processors. Since 2017, the company has been part of the SENN Group and has also been based in Erl since 2022.

    Since 2018, the company has been certified according to ISO9001, currently according to the 2015 revision of the standard.

  • Productoverview

    Refractory | Foundry supplies | Accessories



ATTENTION - Sale to professionals only

Gasser GmbH Foundry Technology

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

© Gasser GmbH Foundry Technology
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