Tested: Surprising Safe Concrete Cleaner for Driveways & More When it comes to cleaning concrete, the battle against grime, oil stains, and mold can feel like a chore-until you find a product that balances power with care. Three standout contenders emerged from our rigorous testing: Simple Green Oxy Solve Concrete and Driveway Pressure Washer Cleaner, CHOMP! Concrete Oil Stain Remover, and MOLD ARMOR 64 oz. E-Z House Wash. Simple Green Oxy Solve shined as a versatile, eco-conscious solution. Its oxygen-based formula tackles stubborn residue without harsh chemicals, making it safe for pets and children. Unscented and concentrated, it's a breeze to use, blending seamlessly into driveways, sidewalks, or garage floors. CHOMP! took the crown for oil and grease removal. This aggressive yet user-friendly cleaner targets grease splatters and automotive stains with precision, dissolving them before they set. While smaller at 32 fl oz, its efficiency means less waste-and less elbow grease. MOLD ARMOR E-Z House Wash surprised with its multi-surface capability. Designed for brick, concrete, trim, and siding, it's a one-stop cleaner for mold and mildew, delivering a streak-free finish. Its 64 fl oz size makes it ideal for larger areas, though it leans slightly heavier in scent compared to the others. Each product proves that safety and effectiveness can coexist-if you choose the right tool for the job.