Re: Question regarding using epoxy or RTV on PCBs



"Michael A. Terrell" wrote:

D from BC wrote:

I just use whatever clear silicone is at the hardware store. I
do smell the acetic acid in silicone.
Did you know you can make copper bright and shiney in vinegar?
Vinegar has acetic acid..
So I wasn't worried too much about home silicone containing some
"Alien" acid that would eat through the floor.
If there are corrosives in the RTV..the reactivity I believe is
limited and reduces to nothing after cure. Some microscopic
copper loss can be tolerated.

I have seen copper traces with opens from the wrong RTV.

I've seen a copper trace completely dissolved as a result of extended use in a
night club where it got exposed to an acid environmemt from hot sweaty people !
Cigarette smoke possibly also played a part.

Humidity's a bitch !


Graham

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