To use the tape, simply stretch it around the material you are trying to repair. As you wrap the tape in a circular motion, it begins to seal and “fuse” itself to the material. The most common forms of self-fusing / self-amalgamating tapes are made of silicone rubber (though other types also exist). They are designed to create a strong, seamless, rubbery, waterproof, and electrically insulating layer.

Wrapping tape on a high voltage cable can be time consuming and error prone since the careful build-up of tape requires accurate half-lapping and constant tension in order to reduce build-in air voids. Rubber tapes are designed to stretch−some up to 1000%. Elongating the tape this way drives to compression, and that results in the strong self-fusion that provides great insulation and moisture protection.

4. Press the tape firmly against the surface to ensure full contact between the tape and the substrate.Smooth out any wrinkles, bubbles, or gaps to create a tight seal. In some cases, you might need to apply multiple layers of tape, particularly when sealing larger gaps or joints.