Silweld is the incredible new silicone self fusing tape that can be used to repair almost anything from an emergency repair to a water hose or air pipe to insulating electrical wires or connections it creates an airtight watertight seal in seconds without the need for any adhesive and it even works under water silweld is an excellent electrical insulator up to 8000 volts it withstands extreme temperatures from 65 to 260c and even withstands pressure to 700psi silweld also resists petrol oils a