I had the same thing happen to one of my slide out seals. But my seal was the H seal (if that's what it's called), the one that is attached to the fixed part of the wall. When I opened the slide, the seal would pull away from the wall. I just used double sided tape as well. So far so good. I would say that you are good to go as well. Jerry.
2005 GMC Sierra 2500HD, Duramax 2WD CC/SB
2013 Cardinal 3030RS full body paint
B&W Companion slider, air bags, EFI Live Custom tuning by So Cal Diesel