Just my 2 cents. When I had a rear slide seal rupture thru either age or wear and tear or both, the Prevost slide seal being over engineered did not allow any daylight or moisture into the bedroom area. The design of the seal has a wiper blade both sides of the inflatable center and that contributed quite a bit to keeping things okay till the inflatable seal was replaced. I did see some dust on trhe rear wardrobe mirror, but that may have been from action the previous nite.
In addition - I learned early on in the ownership of slides that it is necessary to lubricate the slide sockets with graphite lubricant- otherwise the pins can have a hard time retracting - when that happens the pins sound like a gun going off. I believe the pins have a tendency to want to stick to the rubber recesses in the slide room if not exercised often.
Roger that!
2008 Liberty DS XL2
2023 Denali Ultimate
My 6th Prevost