I would reccomend removing the moulding and getting some sealant at the top of the banana skins as well as behind the molding. If your Airstream is made like mine that is where a fair bit of water was getting into the floor system. The skins are lapped on top of the side sheets.
....so many Airstreams....so little time...
WBCCI #XXXX AIR #2495
Why are we in this basket...and where are we going