Formulated specifically for RV EPDM rubber roofing, TPO, vinyl, fiberglass, and exteriors, Dicor Rubber Roof Cleaner lifts dirt and grime yet is gentle on the surface. Its water-softening agents combat hard-water spotting. Simply spray on, brush with a soft bristle brush, and rinse off â leaving a brilliant, spotless surface.• Safe for regular use on all RV roofing and exteriors• Contains water-softening agents to combat hard water spotting• Also recommended for boats, personal watercraft, automobiles, and motorcycles• Professional strength and biodegradable Water-softening agents combat hard-water spotting Simply spray on, brush with soft bristle brush, & rinse off Safe for regular use on all RV roofing & exteriors | Dicor Ready-to-Use Rubber Roof Cleaner, 32 oz trigger spray