JJewitt


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Re: The Mysterious Case of the Exploding Shellac Can

davcefai has the correct answer.

Shellac resin is an organic acid (mainly aleuritic and shelloic acid) and the alcohol/shellac solution is acidic. If the liner for the can is compromised which does happen now and then where the welding seam is then hydrogen gas slowly forms inside the can.
Report your experience to Wm Zinsser Co (the manufacturer) and while I'm sure they will take care of you one way or another. It's a known occurence. They will probably want some information from the can so they can backtrack to the can lot. However I will say that your date indicates a product 4 years old.

posted: 7:25 pm on November 23rd