Originally Posted by
RCMoeur
When a tube of vulcanizing fluid is opened and used on the road, I typically will replace it in the bike's patch kit with an unopened tube when I get home, and place the opened tube in the home patching supplies for use.
I was on a ride with Jacquie Phelan, and when we came to a scenic spot to rest and have a bite, she admonished the people who parked their bikes in the sun. She said "don't join the Park It In The Sun Hiking Club" as in you'll be walking home if you need a patch and the glue is all dried out. Though I question whether sun versus shade makes all that much difference for the little time we spent looking at the scenery, when we'd been out in the sun all day before and after the rest stop. I'd generalize the advice to "think about how old your glue is, and replace it before it dries up." Words to live by — or at least to ride (not walk) by.