Water proofing your ESCs, your reciever, servos and other water sensitive parts is not near as comlicated as you might think. If you are flying in humid areas or even on snow for an example—taking a little bit of time to do some water proofing is time well spent.
Corrosion X HD worked great with servos. You'll need to open up the housing and spray inside all of the components. When you're finished, be sure to clean the outside with isopropyl alcohol, otherwise the hot glue won't stick!
This is an extreme test that we are showing you (completely submerging our electronics) but we wanted to show you how effective these sprays can be at protecting your electronics from moisture.
In some situations, you can even spray your electronics after exposure to moisture.
These sprays can even work in salt water!
Epoxy is the best way to seal your ESC, hot glue will not work.
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