Mine has slides by Lippert
There are two tracks under each slide's floor, and there is no wiper seal covering these openings. Clear to see when outside.
I complained to the selling dealer about one of them so they jury rigged a couple of pieces of wiper seal over the openings
but I didn't notice the other slide having it till later. I tried to have it addressed later on when in camping world for other work, and they verified that it is not supposed to have wipers there and they refused to do it. I've let it be and so far it has been ok
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