I was in the paint isle at Walmart and noticed a gallon of Rustoluem elastomeric roof coating. I purchased one gallon and I was able to get 5 coats on and I still have 1/4 left. spreads nice and dries extremely fast in low humidity. This morning I woke up and the dew was a nice bead. Tilted the pop up and water ran off. I was also able to get this in all the seams nicely, so less caulk now. Just thought I would share the info., at 20 bucks a gallon you can’t beat it. It also filled in some pinholes nicely.