[suicideneil]

There isnt one.

There are a couple waterproof escs- the MTronics and Hobbywing Seaking escs are sold as being fully waterproof, but the former is old and extinct pretty much, anbd the latter is chinese and pretty much untested.

No BL motor is waterproof as they arent 100% watertight.

None of the electrical connections will be waterproof either, nor will your batts be in all likelyhood.

You can take some measures like plastidipping the escs and wires etc, or having a tupperware party on the chassis, but nothing will be 100%.

Best you can do is avoid running a truck loaded with $$$ equipment near or in water as that would just be daft anyway- snow is okay as long as you take the steps mentioned.