Very good advice. If I have another rig with a rubber roof, I'd probably see about the Rhino Lining, rvroof.com, or some other place that has a spray-on elastomer epoxy coating. I keep seeing rigs with those here in Texas, and from what I'm told, once on, it stays on, and leaks are a thing of the past... except if it gets torn or punctured by a branch or other object. The problem is that the businesses that can do this are hard to find. The closest to me is a place about 250 miles away.
However, if the elastomer roof coatings even are near as what is advertised, it would be a cure-all for roof issues, barring physical damage.
