Dicor Rubber Roof Cleaner. Formulated specifically for RV rubber roofing, this bio-degradable deep cleaning formula lifts dirt and grime, yet is gentle on the surface. Simply spray on, brush with a bristle brush and rinse off. For best results follow with Dicor Roof Gard Roof Protectant. Ready to Use Rubber Roof Cleaner. 32 oz. trigger spray bottle.