Originally Posted by topside
A closer photo of the are would be helpful.
Is the vinyl in good shape, or cracked/splitting ?
If the metal under the top has corroded, it sure won't get better with time.

Agreed ,
or Pop the trim off and find out what's under there causing the issue and then treat accordingly. Only other option is to silicone it and cross your fingers beer

www.tandmautomotive-omaha.com