THETFORD 32512 RV Trailer Camper Cleaners Rubber Roof Cleaner & Conditioner 32 Oz. Rubber Roof Cleaner; Use To Deep Clean And Condition RV Rubber Roof From Oxidation/ Tree Sap/ Bird Droppings/ Dirt Buildup; 32 Ounce Spray Bottle; Single UV Blocker So Roof Looks Better Longer. Nontoxic. Nonflammable Non-Petroleum Formula Thats Tested Safe (Petroleum Based Formulas Can Cause Swelling, Cracking Or Degradation Of Rubber Surfaces) Removes Oxidation, Tree Sap, Bird Droppings, And Dirt Buildup From Rubber, Fiberglass And Aluminum Roofs 100 Percent Biodegradable Liquid. Easy To Use. Deep Cleans, Conditions And Protects In One Quick, Easy Step!