Simple Green Oxy Solve Concrete and Driveway Cleaner eliminates tough oil stains, rust stains, grease, automotive fluids, tire marks, exhaust buildup and more. The pressure washer concentrate is ideal for cleaning driveways, walkways, patios and masonry, with a fast-acting foam that cleans using the power of peroxide. The safer, non-caustic and biodegradable* formula meets the rigorous criteria of the U.S. EPA's Safer Choice Program and will not harm surrounding plants, lawns, pets or wildlife. Brighten and renew surfaces without harmful bleach while eliminating discoloration from algae, moss, mold and mildew stains. *Readily biodegradable formula per OECD 301D.