Water proofing

Q&A forumCategory: QuestionsWater proofing
beatified asked 11 months ago

In the past I have used a product made by MG Chemicals called Silicone Modified Conformal Coating. I wanted to know if it would be safe to use this product on the SimpleRTK2B board. I have no desire to expose the board to the elements. This would only be used as an added buffer against damage.
This is the product…
https://www.mgchemicals.com/products/conformal-coatings/silicone-conformal-coating-422b
I would not blame anyone if they were wrong in saying it should be fine. I just wanted to know your best guess. Given the fact that it is an electronics grade coating I would think it would be ok but maybe there are areas I should avoid or some reason to completely avoid it.
 
Thanks

Ardusimple Staff replied 11 months ago

Dear beatified,
in general it is ok to use coating, nevertheless:
– the product has been tested without couting, therefore we can’t guarantee exactly the same specification -40 +85 with the coating on.
– care should be taken with the u-blox module has the metal can with openings, and if the coating goes inside it might affect performance and reliability of the module.

beatified replied 11 months ago

Thanks for the response. Does the SimpleRTK2B have a Humidity rating? I don’t seem to find anything like that here or on the U-Blox website. This would probably be the determining factor in whether or not I wanted to risk it.

Thanks

clive1 replied 11 months ago

uBlox won’t warranty modules which have been coated or potted.

I will also note that the modules are sensitive to thermal changes and airflow which can alter the TCXO frequency instantaneously.