I have a 25.2 Axis and was getting leaks in the rear slider area. I could not find the leak origin. I finally figured out it was coming in around the rear window seal, it only leaked while driving and slider was in. I think the seal experiences extra pressure when we lean on it while sleeping. I recently cleaned around the area between the glass and fiberglass with denatured alcohol and install clear silicone sealant between glass and fiberglass. The leak disappeared, we recently drove Alaska Highway and still not leaking, knock on wood.
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