These rails where the fiberglass parts join had cracks in the seal and many of the screws were leaking. I took most of the screws out and re sealed them, ran new calking on the edges and just to be safe, I covered the whole seam with EternaBond tape.
I covered the motorhome in plastic and scrubbed with Fabuloso until all dirt and old sealer (which was chipping off) were removed. After that I used masking tape to protect areas that I didnt want the sealer to be on. I then used 2 treatments (which is recommended) of the Dicor Fiberglass Roof prep.
The result was fantastic!
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