We specialize in Jeeps in our shop and I removed a few axles that had this and other branded seals on them and we found this: these seals don't get in the way of water, dirt and Debris gets into the tube axle but prevents it from leaving the axle tube and it accumulates around the axle and on the internal seals. It also keeps their internal axle seals from leaking until it's too late. I'm attaching some photos of the axial tubes I was working on yesterday with these seals installed.
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