Electrical tape: types and applications

Wrote Tuesday, by Ionela Stetco


Electrical tape is commonly used to insulate and protect electric components in different sectors, thanks to its dielectric strength and heath resistance. According to the specific field and application it is intend for, electrical tape can be made of different materials, each with its peculiar properties.

Typically, electrical tape is made of many plastics, vinyl being the most popular, as it stretches well and gives an effective and long lasting insulation. Electrical tape for class H insulation is made of fiberglass cloth. The most used types of electrical tapes divide into:

Cloth Electrical Tape

Among the materials used in electrical tapes, cloth is the one with least dielectric strength; however, its excellent mechanical properties make it perfect when a flexible and resistant tape is required for wrapping small electrical components and coil windings, or to fix and repair cables or electrical equipment. When reinforced with other materials (such as silicon and glass fibers), cloth backings can increase their dielectric strength and perform resistance to high temperature.

PVC electrical tape

Polyvinyl chloride is a thermoplastic polymer with excellent mechanical properties, good insulation ability and high resistance to many chemicals used in industrial applications. Electrical tapes with PVC backings are the ideal products for masking during chemical plating process, but can also be used to wrap wires and cables when high flexibility is required.

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PET electrical tape

Polyethylene terephthalate is a thermoplastic polymer resin that boasts high mechanical resistance and good insulation properties; in addition, PET is an excellent waterproof material. For its strength, PET is widely employed as backing in many pressure-sensitive tapes, gifting them with a good tensile strength and elongation capability. As a result, PET tapes are perfect tools for wrapping curved and irregular surfaces (typically coils, transformers, capacitors etc.) and for mounting application of electrical components. Their insulation properties can be enhanced by the use of other materials, such as glass fibers or metal coatings.

Other materials

When excellent insulation properties are required, an electrical tape can be provided with specific materials that perform high dielectric strength. These tapes are mostly used in the aerospace and automotive industry, as their pair extreme insulation abilities with resistance to high temperature.

  • Teonex: a polyethylene-naphthalate film with excellent dielectric strength, resistance to high temperature and dimensional stability.
  • Nomex: used for its excellent thermal resistance.
  • Kapton: a polyimide film that boasts electrical insulation at low temperatures, resistance to radiation and high temperature, flame retardant properties.
  • PTFE: a thermoplastic polymer with high temperature and chemical resistance, excellent dielectric properties.


Do you need an electrical tape for application in electrical and electronics, auto industry, aerospace or communication industry?

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