$100 is quite a big deductible to pay when you could probably fix it yourself for a few bucks. If they try to void your warranty later because you glued your seal back on, then the warranty isn't worth anything anyway, because if they are that ridiculous they would find something else to deny you for if not that. I'd just do it. Some weather stripping adhesive, or even just some clear silicone would probably work.
By the way. I see this is your first post. Stick around and become part of the community. Good group of folks on here. Lots of great info and some decent off-topic talk, and laughs as well, as long as you have thick enough skin to take a little ribbing now and then.