protecting PCB for outside use from wheather conditions


Full time elf
May 9, 2010
Paris / France
After some burning tests on PCB on outside environment, i wanted to catch your attention for saving them
from time and prevent damaging our goodies...

One of the first attack, we can find, after some days on raining, humidity environment is the moisture.
This attacks the soldering points and creates some kind of layer who can immediately affects the boards (short-circuit), micro cuts, etc....

This is the main reason to always find on electronics boxes small bags (anti_moisture/humidity) to avoid such Problems for long storage under external conditions : cold/humidity, etc...

To prevent this, is more than suitable to apply a transparent resin, varnish on the PCB before send them to external world. Just a pincel/brush and apply directly on components soldering points. Quick and efficient.

You can find a lot of products on the market.; prefer liquid with pincel/brush application than Spray. It's more cheaper ( around $30 for 1 L who can covers more than 20m2).

Personally, i use now a transparent protection resin, multi-support, dry in 2 hours, anti-uv...
Hope this helps.