The primary difference between electrical and duct tape is their composition and material. Electrical tape is made from plastic vinyl or PVC, giving it a smooth and stretchy texture. Electrical tape is heat resistant and designed specifically for safely insulating electrical wires and materials that conduct electricity. 

Using car harness tape is a simple yet effective way to ensure the safety and reliability of your vehicle's electrical system. It is a small investment that can have a big impact on the overall performance of your car.