My feeling is that the seals underneath the slides aren't as critical as those on top, since precipitation comes down. I think the only thing to worry about is keeping wild critters out when the slide is deployed.
On our GT 325, the lower blade seal on the bedroom slide has rolled over for about 6" of it length at one end. Unlike yours, ours is fixed to the sill of the opening in the body wall and the slide-out moves over it. My plan is to get some dry-lube (graphite or moly) and spread it along the underside of the slider box. I'll probaly try to straighten it out with the awning rod first.
Frank and Eileen
No longer RVers or FR owners