I got away from those as they trap too much grit and can scratch the tube, like a sandpaper sock rubbing the tube all day. A trick I've used for years with good results is to pack the area between the wiper and seal with a piece of cord coated with seal grease. It will catch what gets past the wiper and can be cleaned and reused. I could go for two seasons on seals, what usually happens is the wipers wear out first and then too much dirt gets in.
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