That was a first for me

[RPE1]

Yesterday I opened a can of Zinzzer Shellac and sealer.  I'd had it for a long time but had never used it.
When I opened the can a loud pop and rush of air came out of the can.  I noted later the bottom of the can was bowled out.
I'd never had that happen before.  But, then again, I'm not really a Shellac type of guy.

RP

[fredhargis]

Be sure to test that stuff before using it. Put a drop on a piece of glass and see if it hardens.

[Scoony]

You can tell the age by the code stamped on the lid.

First number after the letter is the year
Next number is the month, except that n=nov and d=dec
Next 2 numbers is the day.

If that stuff is more then 2 years old, I would be hesitant to use it, but test it out and see if it still dries quickly.