[nativepaul]

I added short servo extendion leads to my RX then put heatshrink tube over it slightly overlength then fill the ends up with electronics safe silicone (normal silicone contains an acid that will eat the metal traces on circuit boards. You can do the same with ESCs but you will have to cut a hole for the heatsink to poke through and then seal round the edges of tthe sink as well as the ends of the shrink.

Alternatively you can take the cases off and spray them with acrylic or silicone conformal coating but this will affect the heat transfer of the heatsink and the thin coating can flex and crack or wear off.

The Mamba and Mamba Max ESCs come pretreated with conformal coating.