The seal that is the issue on our rig is the one on the top of the mega slide. Its only looking melted in one spot at the moment. It is sticky and gooey looking though. We have toppers and always have had them from day one, on all three slides. Looks like the replacement wouldnt be too bad, except the topper is in the way. Guess I will go to steelrubber.com in the spring,.