... .570035kv UsageInsulation protection for wire & cable and middle connections of voltages of 11 kV( J10) to 25 ... 80C to 130C temperature, insulative sealing for communications cable connections,pipeline protection,remedy and waterproof sealing. For J30 tape ... cablesjacketing on highvoltage splices and terminations,moisture sealing electrical connections, bus bar insulations, and sealing high-voltage cables. ...