the correct way to waterproof a servo is to uscrew it then put silicone (like you can buy at the hardware store) around the edge where the cases join then seal the servo back up. the silicone will squeeze up on the case join and seal it.


you can also silicone at the opening of the ballon on the reciever

you cant really totally waterproof a car because you dont want to get water down the air filter but you cant seal that up. and its pretty hard to properly seal your diff gearboxes and pullstart. you can only protect the electrics.

might want to put a balloon over your reciever batteries to