Quote:
Originally Posted by johnrupp
Is that only on an opened tube or does an expired unopened tube also not cure?
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An unopened tube, the only difference i've noted is it gets very slightly softer.
It happened to me twice. I called 3m about there product not curing and they informed me that they could not guarantee it as it was past the expiry date. Until they told me it had an expiry date I had never noticed it on the tube.