ASG offers a range of materials from a number of reputable manufacturers and suppliers, some of which are designed for us within specific applications. One group on offer from our vast catalogue are electrical insulation materials, which consists of a varied choice of material types each with its own unique properties to meet particular application demands.

Mica is just one of many materials which we can offer for electrical uses.  Mica is made by bonding layers of mica paper together with a resin, which are cured into a choice of rigid or flexible boards in thicknesses ranging from 0.10mm to 50mm and in sheet and roll form which we can convert these into a range of finished products including washers, gaskets, pads or strips, many of which can be supplied plain or laminated with one of many self adhesives or foils.

Material Enquiry

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

    Key Characteristics of Mica

    • Colour: muscovite (white) micaand phlogopite (green) mica.
    • Sheet Size: 1000 x 1200 mm
    • Thicknesses: 01mm - 50mm (depending on grade)
    • Density: 2.6 – 3.2 gm/cm3
    • Temperature Range: 500°C to 1000°C (depending on grade taken)
    • Flame resistance: Flame retardant and non-flammable
    • Chemical resistances: inert to water, most acids (except hydrofluoric and concentrated sulphuric), alkalis, conventional solvents and oil.

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

    Help and guidance

    If you would like to speak to a representative to discuss your specific application or requirements please call our sales office direct on 01384 469100, alternatively you can send an E-mail. Simply click on the link and forward us your details along with your question and we will contact you immediately.

    Samples - Technical Mica

    Samples can be submitted for testing upon request.

    Call now for sample requests or further help.

    What is Mica?

    Mica is an Electrical insulation material - used to restrict the flow of electric current, by supporting electrical conductors - without allowing the current to pass through.   Mica is a widely used mineral that belongs to a large group of alumina, iron, calcium, magnesium and alkaline mineral silicates, the material itself is available in two mineral types of mica, Muscovite and Phlogopite, available in a choice of rigid or flexible sheets.

    Why use Mica?

    Electrical insulation materials like Mica and products produced from them are used to provide a barrier to restrict the flow of electrical current, protecting electrical conductors from coming into contact with people or tools during installation, repairs or when an electrical appliance or device is being used.

    Mica provides thermal, electrical and flame resistance as well as rapid heat transfer and mechanical strength which help electric devices, foundries and manufacturing plants deal safely with excess heat.  These excellent properties make Mica perfect for use as fire door linings and heat shields within vehicles and aeroplanes.

    Benefits of Mica

    • Heat Resistance up to 1200ºC (rigid Phlogopite)
    • Excellent flexural strength and easy to be punched and machined
    • Excellent dielectric strength and low electrical conductivity.
    • Incombustible
    • Asbestos, and halogen free
    • Excellent resistance to acids (excluding sulphuric acid), bases, mineral oils and solvents

    Other Types of Electrical Insulation Materials Available

    Advanced Seals & Gaskets work with a multitude of material manufacturers, giving our customers more choice and ensuring we can offer a solution to just about any application, our most popular alternatives to Mica include:

    Epoxy Glass - a green coloured material with good mechanical strength, good chemical, electrical and radiation resistance, low moisture absorption and a working temperature range of upto +120℃.

    Kapton - is a polyamide film which offers a combination of mechanical and tear strength along with chemical, electrical and thermal properties that enables the gasket to withstand vibration and extreme temperatures in demanding environments.

    Leatheroid - is a grey/blue coloured paper gasket material, also sometimes called Elephantide.  This material is used within the electrical industry to insulate hot elements.

    MYLAR is an extremely strong, flexible polyester film.  MYLAR is an excellent insulation material with dielectric strength, moisture resistance and is an excellent insulation material.

    Nomex can be manufactured using nomex paper or nomex board, it can withstand high temperatures, has high mechanical and dielectric strength, and is  an excellent insulation material for all kinds of electrical equipment and applications.

    Presspahn is a brown coloured material,  manufactured using kraft wood pulp.  Presspahn sheets have excellent physical and mechanical properties, generally used as electrical insulation.

    SRBF is resin bonded fibre material which is tough and rigid, with an operating temperature of 120℃, low water absorption and is resistant to wear, impact chemicals.

    SRBP (synthetic resin bonded paper) is manufactured using layers of paper and synthetic resins.  This material is suited to high and medium voltage application.  SRBP has good mechanical and excellent electrical insulation properties, with low water absorption.

    Valox is an excellent electrical insulation material which also offers flame retardant properties.

    PTFE is a non- conductive plastic material used to produce electrical insulation sheets.  PTFE sheets are suitable for high temperature applications and have a high melting temperature.  This material has excellent dielectric properties and can be often found used in circuit boards.

    PVC is a tough, lightweight abrasion, chemical and moisture resistant material which has good dielectric strength making it a great material to use for electrical insulation applications.

    Advantages of Using Mica

    There are a number of properties which bring a number of advantages to using Mica materials.  Mica offers resistance to high temperatures, chemical resistance and durability.

    As Mica is available in both rigid and flexible variants, they can be used in a wider range of applications including furnace insulations, automotive gaskets, fire protection and electrical barriers.  The two types of Mica available are Muscovite and Phlogopite.  Muscovite has a higher dielectric strength and greater insulating properties of the two, therefore more widely used in electrical applications and devices. Phlogopite mica offers a higher heat resistance than muscovite, it is a poor electrical conductor and can be manufactured in flexible or rigid options.   Phlogopite Mica can withstand temperatures of up to 1200°C due to its low thermal conductivity, yet high thermal stability, this is essential in industrial applications where temperatures can reach intensely high levels and the correct insulation for machinery and equipment is vital for safety.   Both Mica types are dielectric, meaning they offer low electrical conductivity, therefore suited for use as electrical insulators in electronic devices for example within circuit boards, industrial machinery, automotive components and medical devices.

    Have a Question About Mica?

    Please contact us using the form below or by calling us on +44(0)1384 252555.