In reply to Phil Sneyd: I have tried this and it doesn't do a very good job at all. I think it's aimed at customising your shoes by expanding the rubberised area. For patching holes, it won't last to the end of a good session.
In reply to Phil Sneyd: Yep same as above. Work ok for a while, but definitely not a long term fix. Tricky/mess to use (or at least I found it so) and even harder to get a vaguely neat finish on the shoes. Also found they required far more of the glue than the instructions suggested.