Rocksolid, gallon, heavy duty concrete cleaner, formulated to clean grease & oil stains on concrete, brick & masonry, also prepares surfaces for finishing by promoting adhesion when staining, sealing or coating, suitable for interior & exterior use, removes oil, grease, tire marks, dirt & stains, cleans surface prior to coating, fast acting, for concrete, brick & masonry, if cleaner dries before rinsing, apply more cleaner, scrub & rinse.