How 2 Waterproof a Servo and a Receiver and a ESC or BESC speed control
In Model Boats waterproofing your electronics is a necessity. Sooner or later everything gets wet on a boat. On a couple of the planes on this site the same thing applies, these planes are Seaplanes flown from and landed on water. Nothing is fool proof but if followed these techniques will save your electronics in case of a dunking.