stop H2O getting into VHF handheld ( Voyager )

[Scare_Rab]

I am aware there have been history of water getting into the Uniden Voyager handheld VHF.

Specifically, via the "speaker / mic " hole. this has only a small rubber cap that is easily & often out of place.

I never connect a " speaker / mic "

My question : what can I do instead?

I am thinking of filling the hole with some sort of "gunk "
a dob of clear silicon?
or some sort of grease?
Anhydrous lanolin?

suggestions, experience, comments welcomed

[skipmac]

If you will never use the hole in question then don't' mess around. Go ahead and fill it with epoxy or 5200.