Is the stuff in your truck safe in heat/cold?

[Dirtman]

Only things I keep in my truck are for flats. Electric tire pump, can of Fix-A-Flat, tubeless tire repair kit, two foot breaker bar with the appropriate socket for a lug nut wrench. All kept in a black milk crate under the bed cover. It always seems to work when I need it. Had a rapid blow-out two weeks ago, Boom and it was flat. Fix-A-Flat failed, electric tire pump failed. Put on the spare and inflated it with the tire pump. Took the truck to my friend's shop and had him patch it. Nice round hole about 3/8 diameter. Have no clue what did it.

I generally keep a bottle of anti-freeze and oil in the crate as well. But most of my driving is within 20 miles or so of home. Rarely ever go much beyond that unless I'm on one of my two motorcycles.