I have a pop-up sunroof on my 90 mightymax and it is leaking when it rains (Almost ruined one of my textbooks). It has been on the truck for as long as i can remember (probably from the factory) and I am not sure how it was installed. I am wondering if sealing it from the inside of the truck would work, but I am wondering if someone else has had this problem before i try anything. I can add pictures if anyone would like to see it.