[Asylum]

Whenever I hear about a method to seal a keel stepped mast I wonder whether the solution may be worse than the problem.

Will having a trapped pool of salt water sitting inside a mast section potentially increase the risk of internal corrosion?

I don't just sit here and wonder about this kind of stuff. I ask because I lost a friend in an airplane accident years ago that was caused by corrosion from trapped moisture in the wing support strut of an airplane. The strut was steel, not aluminum and in all likelyhood it was not internally coated with zinc-chromate.

We get water down our mast via halyard openings whenever there is significant rain, but most of it just drains into the bilge and the rest get's wiped up.