coat the m12 board for water proofing

[mmroden]

mask up board after it's built, spray with some spray can conformal coating. Will require documentation, of course

[mmroden]

More of a manufacturing decision than a design decision

[mmroden]

Should test it (somehow? IP rating test?)

[mechatroniks-git]

Acrylic is easiest to apply, least toxic and makes for easy rework. It has decent moisture protection. Silicone would be a good step up.

This acrylic looks like a good option: https://www.digikey.com/en/products/detail/acl-staticide-inc/8690/10270032

Conformal coatings will be easily removable with MG8310A coating stripper. https://www.mgchemicals.com/downloads/tds/tds-8310a-l.pdf

Background reading: https://www.techspray.com/the-essential-guide-to-conformal-coating

[darraghbr]

Could also fill the case with potting compound but this would make any maintenance down the line much more challenging as it is very difficult to remove.