The bottom seal on my slide started tearing. I found that the rollers (3) the slide ran on were bad that caused the room to be low. Too much drag on lower and a gap on the upper seal. Room needs to be removed on mine to replace seals. Fixed rollers then seals were ok.
2001 dodge 2500 auto, with billet Mojave Green torque converter with 2nd gear lockup mod, raptor 100 fuel transfer pump and gauges. RV275 injectors
94 Alpenlite 27sl with many mods. Master mechanic over 55 years