I purchased a pack of smaller Sterno cans for emergency use. Over about a five year period about half of them, six or so, lost their contents through evaporation. These were pristine, unopened cans.
Interesting. I've never seen unopened Sterno cans of any sort loose their contents. The old, mid 70s, paint can style closure was pretty good. I've seen cans resealed after partial use last well over a decade.
I'm also unsure how jellied alcohol would be less likely to evaporate than liquid alcohol.
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