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Originally Posted by SMCrane1554
Suggestions for best way to repair leaks around roof vents?
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The best way IMHO is to strip off all of the old caulk and start fresh. WD-40 works very well in loosening up silicone and making it much easier to remove. Use Butyl tape between the roof surface and wooden/aluminum riser frame and between that and the vent or the fan vent. Tighten it all down and then use Dicor 501LSW non-sag caulk to cover up the seams and everything else. I saturated the entire vent frame with caulk.
Now if you're a belt and suspender type like me, I then brushed on a coat of Geocel Proflex RV coating. This will seal up a submarine. It's like brushing cold honey and it really sticks to everything.
If the old caulk is still basically good and you don't want to go thru the hassle of stripping it all down, then using the Geocel Proflex will seal it up again.
I'm in the process of doing this now along with a window and the backside of the awning. So far so good.
P.S. All of the previous answers are good. It just depends on your skill level.