That's exactly what i ended up doing recently. think I wrote about it in in a different thread on this same topic....
The silicone job that camping world did when they replaced my back wall ended up leaking
so I opened it up to dry, then resealed with butyl tape.
So far so good
but I still have relatively low confidence in it, only because it's just a poor design and poor execution by thor. They could have used these shoddy fixtures but installed them differently and not had quite as bad of a problem.
I'm still kicking myself for not having them delete these fixtures when tehy replaced my back wall......