After reading through this again are you talking about the rubber seal that runs the under side of the slide out or the seals that run from the bottom up the wall and across the top to the other side? If it is the ones that run the width of the bottom of the slide then disregard the product I posted. I used that for the ones that are glued along the sides and top of the slide out.
2017 Chevy 3500 DRW 4X4 CC LWB D/A
2016 Mobile Suites 36RSSB3
Comfort Ride 245 Hitch