Did some searching, but didn’t see any discussions for the rubber roofs on the trailers.
What are people doing for UV protection on their rubber roofs? The dealership said I really need to wash and apply a UV protection twice a year. But the manual says the rubber roof has UV protection already and specifically to not apply any aftermarket treatments.
Personally, I'd go by what the manual says. Dealers are notorious for mis-information. Our RV is store in a covered storage facility so we don't do anything to the roof other than annual maintenance checks of the Dicor sealant and keeping it clean.