So I used that Caragona stuff. It actually took two goes but the glue was pretty thick in places. It doesn't seem to nasty, although weirdly, on the night I left the rim "soaking" in our lounge (i.e. a confined space), the carbon monoxide alarm went off at 4:30am. Might have been a coincidence, but the gas man didn't detect anything nasty.
So I used that Caragona stuff. It actually took two goes but the glue was pretty thick in places. It doesn't seem to nasty, although weirdly, on the night I left the rim "soaking" in our lounge (i.e. a confined space), the carbon monoxide alarm went off at 4:30am. Might have been a coincidence, but the gas man didn't detect anything nasty.