I agree with FW28Z about the problem gasket
I figure it leaves the factory sufficiently tight, but the foam crushes so after a short time the gasket offers no resilient "push back" and therefore no seal.
I'll bet a better gasket material would be one way to fix the problem, but I like FW28Z's fix of a different fixture.
The entire back wall of my coach was replaced under warranty due to rot because of this.
I am still kicking myself for not having them skip the lights all together and use a surface mounted fixture.
Oh well, the dealer used silicone to seal mine up
but I don't think they did nearly as neat of a job as it sounds like acsnook did....
but regardless, i really dislike silicone and wish they hadn't done it. I find silicone is a poor sealant, unless applied under very specific and highly controlled situations.... and then it's near impossible to reseal ever again because of the residue....
Side note, I'll bet your clearance lights also have leakage.... especially the front fixtures..... another really poor design. I wish I could find a better fixture for these....
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