Our liquid insulating adhesive (black/white) contains bitumen, resin. It can be professionally completed for your broken, split, and cracked wires. Easy to use, can be used with any type of wire or chip, perfect for indoor and outdoor use. Its use method is very simple: 1. Cut off the power, keep the surface dry.2. Apply glue (can be applied with a small brush). 3. Apply and let air dry. 4. Complete repair. And can be applied to any type of wire from cars to boats and in the home. Suitable for indoor and outdoor use.