fuel jerry cans and direct sunlight

Thank you. I haven't been able to source any = particularly soft. what will do?

Make sure they will vent the air - don't want a build up of flammable vapour. For me a home made shadecloth contraption will do the job,

You could wrap them in a space blanket. Very cheap or buy a cheap Supacheap sunblind and wrap them in that.
However, if they are std NATO type jerrys as long as you leave space for ullage they will be fine. That's what they are designed for.

The reason why you haven't bee able to source anything is its not required.

delete bee and insert been

Thats my thoughts too. They are carried on front or back of caravans with no cover. They are made to withstand sun I would have thought.

Yeah, don't bother. Would be more important to check that they don't rub in the holder, over rough roads.

Have seen the Rheem jerry cans swollen with the heat so that they looked like a Sumo wrestler, with no leaks, or ruptures. And this was in back of utes, running off road.

Bob

because of the instructions on the can - but I have noted comments like these and observed plain carrying.

I guess the instructions are legal liability guff, then.

I have had two containers go brittle and crack, i'm guessing from the sun.

Are we talking about a Jerry Can - a metal 20 litre container developed by the Germans in WW2 or a 20 litre plastic fuel container - often called a Jerry Can but is mis-named.

A quality Jerry Can does not need to be stored out of the sun but a cheap copy made in China with inferior metal and construction or a plastic container may have issues.

metal but probably made in China Bushmaster brand