Everbuild silweld tape everbuild 2silweldbk incredible silicone self fusing tape silweld is the incredible new 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 air tight watertight seal in seconds without the need for any adhesive and it even works under water silweld is an excellent electrical insulator up to 8 000 volts it withstands extreme temperatures from 65 to 260c and