Caulking and other maintenance

[TXredfish]

What is the best caulking to use around the exterior trim and windows on my motorhome?
I was thinking about 3M Marine grade above water silicone or maybe I should use something else other than silicone?
Also some of the trim has turned from a bright white to kind of tan. Is there some way to remedy this? What is the best way to remove the black mildew from some of the trim and caulking?
Thanks for the replys.

[TXredfish]

What is the best caulking to use around the exterior trim and windows on my motorhome?
I was thinking about 3M Marine grade above water silicone or maybe I should use something else other than silicone?
Also some of the trim has turned from a bright white to kind of tan. Is there some way to remedy this? What is the best way to remove the black mildew from some of the trim and caulking?
Thanks for the replys.

[MikeandClaudia]

I had asked an RV Technician this question and his suggestion was to use white butyl rubber.

You can remove the old calk with an old fashioned "Church Key" type beer can opener. The kind that makes a "V" shaped opening. Just scrape in in the groove. Be sure NOT to scratch the fiberglass.

["007"]

TXredfish give this LINK a look has info for different conditions.
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