Best Grease Dielectric? For Firewall Connectors

What would be the best thing to coat the firewall connectors with to prevent corrosion? I cleaned them up good back in 2019, but they got a little green funk back on them again. I've cleaned all that off good, but this time I'd like to use a corrosion preventative. Will good old dielectric grease work or is there a better product? Thank you drive through.

This product is graded for Marine use which is a pretty harsh environment.


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