When you install the new one, make sure you use silicone on the edge, just a little bit so that it's not noticeable. What that does is prevent rust from damaging the sunroof. Water gets trapped in there and never comes out so rust develops quickly. So just put the new seal on, then on the topside of the sunroof, where the seal goes around, place a tiny seal of silicone there to prevent water from entering.