VanIsle_Greg
I think I need a bigger truck!
Same experience here with Eternabond. I have used it on my pop up camper roof after using it successfully on my travel trailer. Sticks like poop to a blanket...heh, and bonds to just about anything. EPDM for sure, and painted fiberglass (as on my camper roof). Clean the surface with methyl hydrate first, and it will bond to your roof I am sure.Depending what the hinge area is like you might try EternaBond instead. It is a tape and is more flexible. It is very sticky so it won't come off. In my experience it is a great product.
Sorry to hear you had leaks.