Cheers Grahamm, I always thought these types of thing were only temporary and not a permanent fix.
You're welcome.
Incidentally, if you search on this, you may find articles quoting Bridgestone and Dunlop saying they don't recommend it or approve its use in their tyres as it could invalidate your warranty, but those come from several years ago when this was first introduced.
There seems to have been very little comment from them subsequently, despite people asking for clarification from them, but I think that were it to cause problems, they would have come to light in the past few years.
There's also the argument that you shouldn't do repairs on "high speed tyres", but unless you're actually planning on pushing your bike up to 140mph or so, I'm not sure that would be an issue for most people!