What is shelf life? Answer: As long as the cap on the can is intact, you can keep the sterno stored for years. Stern o does not spoil but it can evaporate from an open can since it is basically liquid alcohol.

How long can Sternos last?

One can of 7oz Sterno should last about 2½ hours. One can of 3oz Sterno should last about 1 hour. 1. Block the wind from blowing out the burners on an outside chafing dish by covering three of the sides surrounding flames with a sheet of heavy duty aluminum foil.

Can you use expired Sterno?

Sterno never expires under standard temperature conditions from about 76*degrees and below. ... Once you open up the can and even if you reseal it, the sterno evaporates or goes hard so it can't be used.