3M™ Temflex™ Rubber Splicing Tape 2155 3M Temflex™ 2155 Rubber Splicing Tape is a conformable self-fusing rubber electrical insulating tape. Temflex 2155 is Underwriters Laboratories (UL) Listed for use up to 600 volts.
I purchased this tape to wrap my tv cable connections up on the roof. It took a little bit to get the hang of using it because it has no adhesive. You're supposed to stretch and wrap to apply it. I wouldn't have known that if I hadn't watched a utube video. Also, you have to go over it with electrical tape to keep the suns uv rays off it. It's supposed to make the seal 100% water proof. I guess time will tell. I've had problems in the past using just electrical tape.