303 Rubber Roof Cleaner helps keep your RV's rubber roof lasting longer. With frequent and proper cleaning of your RV's rubber roof, you can prevent contaminants from becoming embedded in the surface which causes it to degrade over time. 303 Rubber Roof Cleaner is biodegradable, so it's perfectly safe to rinse it off the roof and siding of an RV. You also don't need to worry about harming the solar panels on the top of your RV either. Simply clean any residue that might get on the panels with water. For the ultimate longevity of your rubber roof, use a coat of 303 Aerospace Protectant (item 10046 sold separately) after treating with 303 Rubber Roof Cleaner.• Cleans and dissolves dirt on rubber roofs on RVs, campers, pop-ups, and motorhomes• Biodegradable and non-abrasive• Will not harm solar panels• Won't damage or dry out siding or rubber seals• Great for use prior to 303 Aerospace Protectant Biodegradable formula is safe to rinse off the roof & siding of an RV Won't harm solar panels on the top of your RV Use a coat of 303 Aerospace Protectant (item 10046) for ultimate longevity | 303 Products 303 Rubber Roof Cleaner, 128 Oz