thanks for all your instructions and experiences.

i did as in the video says. actually i used the liquid electric tape thing brushed all the circuit board. but the ESC is kind of a problem, it has two parrelel board so i cant really brush the facing sides of those two boards. i tried sealing the space around though, lol

i dont feel safe stilll, so i hot glued the receiver case except for the place where the connector and crystal goes in. and when i run i wrap tape around there just so water cant go in as easy. even if it does, i still have a layer of rubber formed by the liquid tape protecting most of the circuit board.

the ESC is impossible to seal the case, it has those heat sink thing and iget gets really hot. if u put it in a bag, i guess its fine in cold weather like here, but if its hot i guess it might burn.
i also noticed that no matter how well you seal something in a balloon or a plastic bag, you always end up with slith amount of moisture condensed inside in the end.

So i came up with an idea to waterproof the ESC unit. you could get a small container just enough to put the ESC into it, and fill the container with mineral oil (light), and seal the container, put a heatsink outside of the container with fan if needed for further heat dispersion.

some extreme techno ppl makes computer case out of an aquarium filled with light mineral oil and submerge the entire motherboard and all the cards, including a powerbox into the oil., andseal the aquarium that way they dont get dust on their hardware, and all that amount of oil cools them pretty well too. mineral oil is non conductive, the light grade one pretty much flow like water, it takes the heat away pretty well. if it ESC l gets hotin the oil, i guess you could even make a small radiator to circulate the oil, ahhaha, that would be intense. but it sounds like a cool project for someone to carry out. lol