My 94 Marquis had (has) stress cracks along the front and rear cap area's that I sealed with EternaBond's MicroSealant adhesive. As noted above resealed any degraded areas around items attached to the roof. I also had a leak from the antenna during a really hard driving rain. Planing on just replacing the antenna instead of just the seals. Found leaks around the horn mounts on the front, due to the mounts degrading. Previous owner of mine appeared to have invested in a case of silastic calk, of which I've been removing and correcting the root problems.