[suicideneil]

The current techniques ( plastidip & similar ) are bad because they make it impossible to work on the esc ( forms a hard layer of plastic or resin type substance over the components making it impossible to solder/ desolder them ), should it need sending in for whatever reason. For that reason, and because opening up the esc for any other reason than to replace the fan, water proofing = warrenty void.

If castle are working on a 100% waterproof/sealed esc vs the water resistant MMM, then they most likely cant and wont comment until its time to release it- pretty standard practice these days with new r/c products.

I have heard a guy say that he used liquid latex ( masking fluid ) to waterproof his esc, and since it can be peeled off very easily & in one piece ( prior to sending it in for servicing ), it is feasable to waterproof the esc and not void the warrenty, but thats a grey area at best.

A truelly waterproof esc would need a sealed case like the vxl esc- not impossible with a little redesign work, just needs space for an o-ring between the case and heatsink ( to prevent moisture entering that area, and between the case halfs, then wont grommets to seal the various wires as they exit the esc case ( vs the current larger opening and vents etc ).