MATE build - Waterproofing Brushless motors

I am working creating 3D printed T100 thrusters. I have come to the motor part. Will waterproofing with silicone conformal coating? Or clear nail polish?

I have seen people on YouTube use MG Chemicals Thermally Conductive Epoxy Encapsulating and Potting Compound. It has to be oven cured, But it appears to work. Search for SV Seeker ROV

that helps thank you