Lustre Stone Care Restorative Cleaner strengthens the floor as it cleans. With a non-etching, neutral pH formula, Restorative Cleaner can be used on a variety of hard flooring including concrete, terrazzo, stone, and masonry. Featuring unique nanoglass technology, Restorative Cleaner fortifies hardness as you clean to protect against wear and heavy traffic. The rinse-free formula dries quickly to provide a streak-free floor.