It's been raining pretty good over the last several days and the drip rail over the window is performing perfectly. The window below the rail is dry and the area inside where I could feel dampness is dry. I know I could have caulked the window again or used butyl putty tape but it would probably fail again. I consider the drip rail to be a permanent fix. There are also drip caps available through say Camping World that can be ordered to size. I needed mine now so aluminum angle was the quickest available option.
So there you have it, Success!!!
