In reply to Ade in Sheffield:
> I've used self annealing electrical tape on my spectra slinged rocks (6,7,8) ...
A couple of (old) bought ones I have are tidied in a similar way using heat shrink tubing. You could do the same yourself, if you were careful with a small heat gun.
However I echo Harold Walmsey's general warning above. A *very* long time ago, when we still using home-made slings from lengths of tape tied with water knots, a friend of mine made such a sling, and tidied the ends with electrical tape. Over time, and with use, the knot 'walked' - with the result that the (then superficially good) sling consisted of a knotted tape, held together with electrical tape. We only noticed that just in time, as he was preparing to abseil off the bloody thing!
Keeping things simple and fail-safe is always a good idea.
Post edited at 21:21