Dicor Rubber Roof Cleaner is 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, ready-to-use, and biodegradable Also recommended for boats, PWCs, & automobiles Professional strength & ready-to-use Simply spray on, brush, & rinse off for a brilliant, spotless surface | Dicor Ready-to-Use Rubber Roof Cleaner, Gallon