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Subject: Preventing oxidation of copper outdoors

From: alan00463@...
Date: 2016-07-30

In searching for a vendor of Liquid-Tin I ran across
this waterproofing spray:
http://bamtech.com/product/acrylic-coating/

Since I live in the RustBelt and know what oxidized
copper looks like, I wonder if I should use this on
my PCB to keep the copper from contacting moist air?

My PCB will be used outside in a plastic box.   The
plastic box will be waterproof, but not airtight.
I am guessing the Liquid Tin and leaded solder  ap-
plied to the traces will prevent oxidation.   I just
want to know if anybody has had experience with this
product or, if my thinking is wrong.

Has anybody used this product on a copper PCB used
outdoors?  If yes, would you recommend it?   Or
would something cheaper like this
http://www.sherwin-williams.com/home-builders/products/catalog/krylon-indooroutdoor-lacquer-spray-paint/?referringCategory=interior-paint-coatings/aerosols/&N=1568189400
work just as well?