Expanding foam self expanding

[raybarrow]

Hi Folks,
Thought I'd give those very thirsty weeds on the drive and patio a drink spiked with weedkiller. Keep the weed killing kit, sprayer etc in a plastic box with a few bits and pieces. Went into the garage and the box was full of, what I thought at first glance was a nest (wasps?). On closer inspection the can of expanding foam had expanded all by itself, filling the box and enclosing the bits and pieces. I managed, eventually, to free the sprayer and the weedkiller container - not a job I was expecting to do.
What caused it to do that? I haven't got down the can yet so don't know if it split or what. Think I'll just free what I need and dump the lot. A job for another day.
Ray.

[eepee]

Is the can one of those that you should turn upside down and do a short squirt to clear the nozzle?

Just an idea that may be totally wrong.

Regards,
ep

[pje16]

How about the heat?

[raybarrow]

Hi,

Is the can one of those that you should turn upside down and do a short squirt to clear the nozzle?

Quite possibly, but I can't be bothered to free the, presumably empty, can from its foam prison. It's a a bin job.
Ray.