Conformal Coating

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Hello.

I am planning on sealing the pins of a humidity sensor board I'm making. Since the board will be exposed to high humidity at times, it will need conformal coating.

What is your experience with coatings? I checked Mouser and there are so many options and types... I'm a bit new to conformal coating so any help would be greatly appreciated.

Thanks in advance!

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I use Electrolube CPL200H.

Just make ABSOLUTELY sure that you mask any moving parts like switches or they will not be moving parts any longer. :)

John Samperi

Ampertronics Pty. Ltd.

https://www.ampertronics.com.au

* Electronic Design * Custom Products * Contract Assembly

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js wrote:
Just make ABSOLUTELY sure that you mask any moving parts like switches or they will not be moving parts any longer. :)

Not moving anymore, is that what they mean by solid-state switches :lol:

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That's a "permastable multivibrator."

If you don't know my whole story, keep your mouth shut.

If you know my whole story, you're an accomplice. Keep your mouth shut. 

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Also, it does without saying, that you need to mask off any headers and/or connectors that you want to still plug together and conduct current as well.

LArge scale manufacturing guys hate to program and test devices before conformal coating as it often means in complex assemblies that they have to disassemble, coat, and then reassemble and retest afterward. However, it is a PITA trying to chisel some types of conformal coat off a board to try to touch up some solder joints fine pitch SMT pins on a high pin count device.