Everything You've Ever Wanted to Know About High Voltage Tape

https://bbarlock.com/index.php/10_No-Fuss_Ways_to_Figuring_Out_Your_Self_Amalgamating_Tape

This self-amalgamating conductive EPR tape is an advanced cable jointing solution designed for applications up to 69 kV, ensuring the seamless continuity of conductors and core screens at cable joints.