Sure Klean Restoration Cleaner Carbon and pollution remover.
Restoration Cleaner is a carbon solubilizing cleaner for brick, granite, sandstone, terra cotta and many exposed aggregate surfaces. Apply Restoration Cleaner to masonry surfaces to loosen and dissolve dirt, paint oxidation, carbon buildup and other atmospheric pollutants. A simple cold-water rinse clears away the stains.
Manufacturer: Prosoco
Available in 1 gallon containers.