Bond It F4 Emergency Self-Fusing Silicone Tape, Repair Plumbing Pipe & Radiator Hose Leak, Electrical Insulation, Permanent Bonding, Waterproof, 1" x 36' x 20mil, Black, Pack of 2

we used it to seal a crack in our coolant tank. It has held while we save up to fix it!

I have used F4 tape since 1976. Love this stuff.

Just used some to re-insulate some jumper cable clamp-handles, and wow, I am in love with this. I wanna fuse everything. Super grippy, very easy to use.

Wrapping a wire harness in this tape, works well tight coils and only adheres to itself but attracts dirt and debris by touch just wipe it off

Just like the tape I used in the USAF 45 years ago. Same name but no US Mil stock number. This really is the best electrical tape, bar none.

Self fusing tape is not sticky tape. You have to stretch it a lot so the wraps pull nice and tight and fuse to themselves. I use this type of tape for non-pressure waterproofing, smoothing out hose clamp wire & the like so it doesn't snag, building strain reliefs, and emergency (and temporary) pressure patches. I once patched a radiator line on a vehicle with silicone tape - expecting it to fail in minutes or an hour. Lasted around a month (I left it on to find out). Easily long enough to get by while I ordered the replacement part. But this stuff is not duct tape or gaffer tape. It has different uses than sticky tape.

Why did you pick this product vs others?:i bought two to see which worked better

Great tape for heat