I have so damaged cables repaired, a leaking trap under the sink "drained" and an attached knabbertes cable car to the repair tape "repaired". One must of course be careful to do everything from grease and dirt before mounting. It is also important necessarily good overlapping attach the tape when you wrap, because it does not stick, but be welded itself! Well put it.
The repaired places hold despite heat / cooling / water contact impeccable.
Only the price of the 3 meter I find something "steep". On the other hand, it is worth gold, so to have a repair tape at hand, what works well.