Mylar Pads

Mylar Pads – High-Performance Electrical Insulation

Advanced Seals & Gaskets Ltd (ASG) supplies a wide range of precision-cut Mylar pads, part of our extensive electrical insulation product range. Mylar, also known as BoPET (Biaxially-Oriented Polyethene Terephthalate), Melinex, or Hostaphan, is a high-strength polyester film renowned for electrical insulation, durability, and heat resistance.

We stock and convert Mylar and other electrical insulation materials, including papers, resins, laminates, and plastics, making it easy for our customers to access customised insulation solutions for diverse applications.

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For information on Mylar Pads – High-Performance Electrical Insulation please complete the following quick enquiry or call us on +44(0)1384 252555.






    Key Characteristics of Mylar Electrical Insulation

      • Colour: Transparent to milky white, depending on grade

      • Thickness: 12–500 microns

      • Roll Size: 914mm wide, 25–200 meters long

      • Resistance: Moisture, oil, grease, and many solvents

      • Dielectric Strength: 7000 volts/mil

      • Flammability: Some grades UL94 VTM-0 flame-rated and halogen-free

      Full technical data sheets are available upon request or via our online portal.

    Product Specification Sheet

    What Are Mylar Pads?

    Mylar pads are thin, precision-cut insulation sheets designed for electrical and electronic applications. The material is typically measured in microns, ranging from 12 to 500 microns, and supplied in rolls 914mm wide and lengths between 25 and 200 meters, depending on thickness. These rolls can be cut into custom pads to suit specific dimensions or shapes, including:

    • Squares or rectangles (with optional radius corners)

    • Circles or discs

    • Ovals

    Pads can be supplied plain or self-adhesive, offering flexibility for easy installation. Mylar is a white, heat-resistant polyester film with excellent dielectric strength, chemical resistance (excluding alcohol), and remains non-brittle over time.

    These pads act as barriers or gap fillers, preventing electrical currents from passing through while supporting conductors, ensuring effective and safe electrical insulation.

    Why Choose Mylar Pads?

    Mylar insulation pads are ideal for applications requiring strength, flexibility, and high thermal stability. They are commonly used across:

    • Electronics and electrical components

    • Cable insulation

    • Heating elements

    • Solar panels and motors

    • Aerospace components

    • Printing, packaging, and magnetic media applications

    Their low moisture absorption, high tensile strength, and thermal resistance (-70°C to +150°C) make them suitable for demanding indoor and outdoor environments.

    The material’s versatility allows it to be supplied in pre-cut pads, rolls, or sheets, giving customers complete control to customise components according to exact specifications.

    Benefits of Using Mylar Pads

    • Multipurpose durable PET plastic film

    • Excellent chemical and water resistance (except alcohol)

    • Wide temperature range: -70°C to +150°C

    • Impact and tear-resistant

    • Electrically insulating

    • Available in 23–500 micron thicknesses

    Other Electrical Insulation Materials Available

    ASG works with leading manufacturers to offer additional electrical insulation materials:

    • Epoxy Glass: Mechanical strength, chemical and electrical resistance, up to +120°C

    • Kapton: Polyamide film with extreme temperature tolerance, vibration and chemical resistance

    • Leatheroid (Elephantide): Grey/blue paper gasket for insulating hot elements

    • MICA: Mineral-based sheets, asbestos replacement, withstands temperatures up to 1000°C

    Advantages of Mylar Pads

    Mylar pads are versatile and long-lasting, ideal for electrical, sealing, and packaging applications. They offer:

    • Resistance to moisture and most chemicals 
    • Gas and electrical sealing capabilities 
    • Exceptional strength, flexibility, and dimensional stability 
    • Wide operating temperature range (-70°C to +150°C) 
    • Available in multiple grades, including flame-retardant options 
    • Rough surface facilitates adhesive bonding and handling. 

    Applications include cable insulation, solar panels, motors, heating elements, aerospace components, and more.

    Contact ASG for Custom Mylar Pads

    For bespoke Mylar insulation pads or samples, call 01384 252555 or submit an enquiry form. Our team will guide you in selecting the right thickness, grade, and shape for your application.

    Have a Question About Mylar Pads?

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