Fibre Jointing Millboard

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Fibre jointing millboard is a durable, heat-resistant, non-asbestos material that is manufactured in a standard thickness between 2 and 10mm. Fibre jointing millboard exhibits a variety of resistances, offers good heat and fire resistance, and is available in a variety of forms. With access to the latest technology, we offer the option to add self-adhesive backings and a peelable liner on one or both sides if our customers require it.

Here at Advanced Seals & Gaskets Limited, we maintain close relationships with a variety of suppliers. This allows us to provide a wide variety of materials that can be tailored to meet the specific requirements of our customers. In addition, we perform all conversions on site, providing complete quality control at all stages of the process. Whether we manufacture as a one-off or in large quantities, we work closely with our customers to provide a completely bespoke service. Utilizing state-of-the-art machinery and a highly trained workforce, we produce top quality products to meet a wide range of specifications.


Fibre jointing millboard is available from us in many forms including:

  • Gaskets
  • Pads
  • Sheets
  • Strips

Product Enquiry

For information on Fibre Jointing Millboard please complete the following quick enquiry or call us on +44(0)1384 252555.

    Product Specification & Key Characteristics

    • Colour: Anthracite
    • Density: <90KG/M³
    • Fire Propagation Index: <12
    • Operating Temperature: -30°C to 100ºC
    • Thickness: 1mm – 100mm (can be laminated for greater thickness)

    Full technical data can be supplied upon request,
    or downloaded from our online portal.

    What Is Fibre Jointing Millboard?

    Fibre jointing millboard, also known simply as millboard, is a type of non-asbestos, non-metallic, and non-flammable material used for gasket and sealing applications in various industries. It is typically made from a combination of cellulose fibres, fillers, and synthetic rubber or elastomers, which are compressed and bonded under high pressure and temperature to form a dense and durable sheet.

    Product Specification & Key Characteristics

    • Standard Thickness: 2mm, 3mm, 4mm, 5mm, 6mm, 8mm and 10mm
    • Size: 1000mm x 1000mm
    • Colour: Beige
    • Temperature range: certain grades reaching up to 450°C
    • Resistances: Heat and fire resistance, certain chemicals, fuel and oil

    Why use Fibre Jointing Millboard?

    We supply fibre jointing millboard in many form for our customers to use as required. Fibre jointing millboard finds applications in a wide range of industries, including automotive, aerospace, marine, power generation, and various manufacturing sectors. It is commonly used for sealing pipe flanges, valve covers, boilers, furnaces, ovens, and other equipment or machinery where a reliable, heat-resistant, and compressible gasket material is required.

    Benefits of using Fibre Jointing Millboard?

    • High Temperature Resistance: Millboard is designed to withstand high temperatures, making it suitable for use in applications where sealing and gasket materials are exposed to heat.
    • Excellent Compressibility: The fibrous nature of millboard allows it to conform and seal effectively against irregular or uneven surfaces.
    • Good Mechanical Strength: Millboard has decent mechanical strength, allowing it to resist compression and maintain its integrity under pressure.
    • Electrical Insulation: It provides electrical insulation properties, making it useful in electrical equipment and applications.
    • Chemical Resistance: Millboard can offer resistance against various chemicals, depending on the specific formulation.
    • Low Thermal Conductivity: It exhibits low thermal conductivity, which helps prevent heat transfer and energy loss.
    • Easy to Cut and Shape: Millboard is relatively easy to cut, shape, and form into gaskets of various sizes and designs.
    • Non-Asbestos: It is a non-asbestos material, which makes it safer to use compared to some older gasket materials that contained asbestos.

    Advantages of using Fibre Jointing Millboard

    Using fibre jointing millboard offers several advantages, making it a popular choice for gasket and sealing applications in various industries. Some of the key advantages of using fibre jointing millboard include its high temperature resistance, compressibility and its ability to be cut and shaped easily. In addition, fibre jointing millboard is extremely cost effective due to its durability and long shelf life if maintained correctly.

    Different Grades of Fibre Jointing Materials

    Here at Advanced Seals & Gaskets Ltd, we work closely with a network of suppliers and manufacturers to ensure we offer a wide variety of products while keeping lead-times to a minimum. Fibre jointing materials available from us include:

    Betaflex is a cellulose-based fibre material, made using a nitrile binder giving it excellent tensile strength, low compressibility, good elastic recovery and erosion resistance. Betaflex is used widely in the industrial and automotive sectors due to its resistance to oils. petrol, diesel and even antifreeze.

    Ceramic Fibre material is constructed using ceramic fibres and an organic binder. Designed for extreme temperature applications reaching up to 1250℃, ceramic fibre rolls offer excellent strength and thermal resistance.

    Gasket Paper has a high resistance to petrol, oil and water, and is therefore often utilised within automotive applications.

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