OC Organic Stain Cleaner is made to eliminate hard-to-remove stains from organic elements, such as fruit and berries from nearby trees, leaf marks, acorns, and wood tannins, from hardscape surfaces without damaging the material or altering its color. This specialized cleaner is particularly effective on natural stone, concrete, and pavers, where organic stains can be especially noticeable and challenging to remove. OC Organic Stain Cleaner is safe for use on various hardscape surfaces.