Phil Allison wrote:
Terry Schwartz wrote:

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I'd bet the manufacturers web sites would have information on shelf
life. Double what they claim, and you'll have a more realistic number.


** Double ??

Refrigeration extends the working life of most adhesives.


** A local supermarket store was offering a nice discount on 100gm tubes
of famous brand silicone adhesive, the "neutral cure" type that is useful in electronics.

I bought two tubes and soon found they had been filled with "acid cure "
material - no use at all as the acetic acid vapour corrodes any copper it gets near.

The warehouse asked me to send them the bad tubes for appraisal and
shortly afterwards a parcel arrived with 12 tubes of the correct "neutral cure" type.

Unfortunately, most of the 12 tubes had gone rock hard they were so old.


.... Phil

I never found acid cure do much of anything to copper. I put some on
circuit board to test. Contrary to reading, i believe the stuff passes
moisture and corrode metal underneath.

Greg