I'm glad this thread was started. I've been maintaining my seals but never knew there was a bottom seal. Sigh....
We've never had a leak like the one described but we've only had a few rainstorms while towing. I am looking at them now and do see how it could happen. On our kitchen slide here is the seal:
If you notice those four marks, they correspond to these wires and gas lines:
I can see how those things and the L shaped aluminum brackets could create a gap in the seal which would allow water to penetrate.
On the couch/dinette slide, again I see where the seal is deformed a little:
Which matches up to this on the slide:
There is also some foam right above the back tire at the back edge of the slide.
I'd check all these spots on yours to see if you can determine the entry point. Hope this helps.
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