How to Repair Rubber Coating on Bare Wires & Cables

The rubber coating on wires and cables prevents electric shock and provides a degree of protection from crimping or other damage. The insulation material may become nicked or cut. Rubber coating on cable and wire can also suffer the effects of weather. Outdoor cable insulation may begin to peel and rot from exposure to heat and rain. To repair wires and cables that are still in use, buy a roll of silicon rubber electrical tape.

The rubber coating may gradually peel and crack on wiring.

Step 1

Unplug the wires or cable from any wall outlet if you are repairing electrical wiring. Disconnect the wires or cable from any device connected to an electrical supply.

Step 2

Turn the wire or cable over in your hands to inspect. Consider replacing the wiring if it is nicked, frayed or visibly damaged. If the wires are intact and only the rubber coating is damaged or missing, continue with the repair.

Step 3

Press the edge of the rubber silicon electrical tape over one end of the area to be repaired. Hold the tape to the wires or cable with your thumb.

Step 4

Pull the roll of tape gently to create tension as you wrap the tape around the bare wires or cables. Overlap each wire wrap slightly to prevent any gaps in coverage.

Step 5

Cut the end of the tape from the roll with scissors and press the edge firmly onto the wire or cable.