hello everyone, my question today is this: got an '86 gulfstream motorhome with a roof leak. it has a metal roof. would it be wise to kool seal the whole thing or just seams? of course i cant find the cause of the leak. no major damage yet. next question has anyone replace the tub. i have a good size crack and it needs to be replaced. is that something i should forget and pay a dealer? thanks for any help.