Isofrax® 1400 | Alkaline earth silicate fibre mats

Isofrax® 1400 | Alkaline earth silicate fibre mats

Isofrax®-1400 thermal insulation from Unifrax belongs to the last generation of the proven, groundbreaking technology for low bio-resistant fibers.

1400°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: Equipment

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


    Isofrax® 1400 | Alkaline earth silicate 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.

    Isofrax® 1400 | Alkaline earth silicate fibre mats


    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.

    Isofrax® 1400 | Alkaline earth silicate fibre mats

    Temperature change

    High resistance to temperature changes.



    Chemical Analysis 

    SiO2: 70,0 – 80,0
    MgO: 18,0 – 27,0
    Trace proportions: 0 – 4
    Physical Properties
    Colour: White
    Classification temperature (° C): 1400
    Application limit temperature (° C): 1300
    Melting point (° C): 1520
    Mean fiber diameter (μm) 4,5
    Permanent linear shrinkage (%) after 24 hours
    1400 °C: 2,7
    Volume weight (kg / m³) 96 128 160
    Thermal conductivity (W / mK)
    200°C 0,07 0,07 0,07
    400°C 0,13 0,13 0,12
    600°C 0,22 0,21 0,19
    800°C 0,26 0,20 0,18
    1000°C 0,49 0,43 0,35
    1200°C 0,66 0,56 0,45
    Tensile strength (kPa) 40 60 80


    Isofrax®-1400 thermal insulation from Unifrax belongs to the last generation of the proven, groundbreaking technology for low bio-resistant fibers. Isofrax1400 blanket is manufactured using modern defibration techniques combined with a new proprietary processing technique, which means that both a classification level of 1400 and a higher application temperature limit for
    Applications up to 1300 ° C is offered. The needled mat is completely inorganic and retains its strength, flexibility and thermal properties without generating smoke in many work environments. Isofrax 1400 blankets are available in a variety of density and thickness combinations and can be used in a variety of high temperature applications.


    • High temperature stability
    • Low thermal conductivity
    • Resistance to temperature changes
    • Light weight
    • Good workmanship
    • Low heat storage
    • Excellent flexibility
  • Downloads

    Datasheet Isofrax® 1400

    Product properties, typical applications and availabilities.


    KS Technologie product catalog

    Refractory | Seals | Foundry supplies | Conveyor chains | Chesterton


  • RBS Kompensator GmbH

    In 2009, at the request of many customers, RBS Kompensator GmbH was founded as the 100% sister company of KS Kneissl & Senn Technologie GmbH under Senn Beteiligungs GmbH.

    Building on the existing know-how about temperature-resistant high-performance fabrics, these began to be manufactured as individual pieces in the form of soft-material compensators by hand in Erl. Gradually, various sewing and welding machines were acquired in order to be able to produce all common shapes (round / square / round on square etc.) in the best possible way.

    Together with our team we try to live the idea of the "One Stop Shop" and make sometimes impossible things possible according to our motto: "Viribus unitis - with united forces".

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    ATTENTION - Sale to professionals only

    RBS Kompensator GmbH

    Your specialist for fabric expansion joints, rubber expansion joints, metal expansion joints, as well as bellows and textile insulations.

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