Andy wrote:
I sanded the tube, applied the patch and clamped it in a vise for an hour.

It takes just a few seconds of _high_ pressure to bond (not sure
if "vulcanize" is the correct term?) and then you can immediately
check it.

--
Note: please read the netiquette before posting. I will almost never
reply to top-postings which include a full copy of the previous
article(s) at the end because it's annoying, shows that the poster
is too lazy to trim his article, and it's wasting the time of all readers.