best protection for elec connections

[dunkmuddie]

hi guys after pulling the controller to my winch apart because of it not working ive found it was from dirt and corroded terminals whats everyone recommend to use to stop this.
thanks for any info
Dunk

 

[Leprechaun]

Silicon spray works OK.

 

[Jason]

Vaseline, silicone/sikaflex, depends on the application.