Recaulking rubber roof edge

turboo wrote:
I replaced the bathroom vent cover and found unexposed rubber roof material folded under the vent frame.It was bright white. So the exposed surface I'm seeing on the roof, as shown in the photos is the rubber membrane without the factory white top coating, as its eroded away.

Now you get it
Dicor sheds from day one , it will leave a coating on your windshield on the truck as it does , if you put 303 protectant on it ,that helps some and keeps it in better shape
But if the roof is showing black spots , it should be recoated . Dicor makes a kit to do it , its not cheap though
Your roof will probably not leak in the shape its in ,(not talking abut the penetrations ) and will likely last more seasons as it is , the choice is really if you want to spend the time removing caulking and buying 6-8 tubes of dicor to recaulk , and do it again later if you recoat it , or just touch up the caulking now and watch it , and wait to do it all next year , or after that