"Best" way to weather proof 12 volt elec connection

Any wisdom on the “best” way to weatherproof couple spade connections on 12 volt ?

I’m replacing a 5 psi pressure switch that has a “Delphi PA66” connection with a 15 psi switch that only has spade connections.

Looking for suggestions that are better than mine. In the past I have used liquid elec tape or plastic “dip it” but wondering if there is something better. Switch is under vehicle and will be exposed to all weather and probably 14 or 16 gauge plastic coated wire.

Thanks