I think this an American product so the half ounce size doesn't give a clue on age as they still sell products in imperial amounts. If there is a web address on the packing its probably less than 15 years old. If there is a bar code on the pack it's less than 30 years old..
I can answer this question...
how old is an 1/2 oz container of heddy fabric mending adhesive?
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