I don't know if the roofs are still by Dicor or not. Dicor never made a cleaning product for their roofs until a couple of years ago. They just recommended Dawn and a brush. They received so may inquiries about a cleaning product that their marketing department could not resist putting out their own brand. You don't need to fatten the wallets at Camping World with an expensive cleaning product for your rubber roof. Just get some Dawn, a hose and a not too stiff long handle brush. But be careful up there, dawn on the bottom of your shoes can be slick.