In my experience window seals last about 4 years. My 07 Elite Suite had Hehr windows and I think I replaced about 3 windows in the 4 years I owned it. My 11 Escalade has Lippert (Kinro) windows and in 4 years I have replaced most of them already and one particular window 3 times. The Hehr seem to last far better than the Lippert (Kinro)
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2012 F-350
2011 Escalade 37RE
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