I wanted to love this product. I researched and called Heng's to see if my Fleetwood epdm roof needed primer. They said no. I worked my butt off first scrubbing the roof according to the directions, letting it dry, then rolling it on. This took many hours. I even took the 2 cans i bought to Walmart to have them shaken up. When my first coat was done and cured for 2 days i went up again. The paint is peeling off like Elmer's glue when u rub it in the palm of your hand. Then it rained. The paint streaked down over every single window on my coach. Lines of white streak. And hard to get off. I can't blame the Heng's company. When i called they were surprised and said my results were unusual. They asked where i bought the paint, and suggested it was perhaps a bad or unrotated can from inventory (unrotated meaning shelf life). I returned the paint for a refund. That's fine. But it doesn't compensate me for all the time and extremely hard work i put into the project.