I have some Proflex RV on order from Campingworld.com. However, after watching a few youtube videos, it looks like I also need Butyl tape. Or does the Proflex substitute for the Butyl tape?
I have the corrugated siding on my RV so the surface is not nice and flat which makes me think that I would probably need the Butyl tape to fill in the low ridges on the siding.
This is a video that looks like my situation and how I will attack my window. Let me know if I am on the right track.
https://www.youtube.com/watch?v=belS_95xLcA