Spektrum Receiver (maybe Usefull info)
 

Last NW regional a couple of cars (including mine) cut out because of water in the receiver.

Now my receiver had blue-tack over the plugs and LED and programme switch and i though it would be ok.

BUT, there is a little hole in the side of the RX for re-routing the ariel wire through, rather than out the top. This is where mine let water in and it cut out.

i always use plasti dip to seal my electerics you can get this in loads fo colours and neaver had a water in electric problem since using it attach all cables ect then dip it let dry then fix to car :)

http://www.plastidip.co.uk/index2.cfm?page=productIndex

hopefully this helps

would that void the warranty at all?

it peals off leaving no resadue atall