Ambersil do a con-formal coating that I have used and totally solved a leakage problem on a 'chuck clamping force meter' I was repairing. I'd noticed that the sensitive bridge circuit measuring it's strain gauge was changing as I breathed on it!
It's good stuff and RS stock it:
https://uk.rs-online.com/web/p/conf...VqrXtCh3XrA6lEAAYASAAEgJoJfD_BwE&gclsrc=aw.ds
It's good stuff and RS stock it:
https://uk.rs-online.com/web/p/conf...VqrXtCh3XrA6lEAAYASAAEgJoJfD_BwE&gclsrc=aw.ds