i used it to fix a hole in my shoe where i wore through stopping a bike without a brake.. but not really anything particularly useful.
have found “polymorph” to be more useful really, it cures to a solid plastic rather than rubbery stuff and does it quickly, though it’s a little harder to cut and manage etc, have to plan how to shape it beforehand for the best results.
(it’s plastic with a low melting point, put it in the microwave for 30 seconds, mould it, solid at room temp and you can re-use it)