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Ok. The sun came out. Got on the ladder and scraped of the flex seal (what a pain) some places it stuck ok, but on places where there were other sealant, it came off as a loose skin.
Anyway, after that, I popped out the seal (the section in blue in the previous picture) hiding the screws.
I could immediately see it was wet in there, maybe JRTJH is on to something.
That moisture there is normal I think, because the blue ribbon covering the screws is not made to seal at the top and bottom, it's made to cover the screws.
I sealed around each screw with proflex.
I also noticed that at 2 locations, there were no screws inserted in the pre-drilled holes of the profile. This is ok, because no holes were drilled into the camper, and I could see some of the plastic or robber seal behind it being pressed out the tiny hole because of the pressure of the gutter against the camper wall, indicating the rail/gutter was on tight and they did seal behind it.
It was in 2 sections though, so where they met I added some extra proflex.
Then at the top of it where it connects with the rubber roof, I also sealed a seam, front to back. The proflex sticks much better and is clear.
Thinks it's going to rain tomorrow or later tonight.
Will give an update.
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