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The tape fuses or seals itself to create a waterproof and airtight layer when stretched and wrapped around objects.

Therefore, the insulation must not only have the dielectric properties we seek but the mechanical strength as well. We want insulation that is:

1. Dielectric Strength High voltage insulation tape must possess excellent dielectric properties to withstand high electric fields without breaking down. The dielectric strength is a measure of the tape's ability to insulate against electrical current.