Mold Armor® Deck, Concrete & Driveway Wash Pressure Washer Concentrate is a powerful outdoor surface cleaner and mold killer. This power washer concentrate kills mold and mildew and blasts away tough dirt and grime, improving pressure washer performance. It is ideal forcleaningsealed decks, composite decks, fences, driveways, cement, concrete, and asphalt. To use this as a concrete cleaner, spray surrounding plants with water using a garden hose. Next, add product to a clean pressure washer solution tank. Then wash surface with cleaner using a LOW pressure spray nozzle and allow to work for 10 minutes. Rinse surface with water using a HIGH pressure nozzle and spray surrounding plants with water using a garden hose after use. Finally, rinse pressure washer tank with water prior to storage. Keep out of reach of children and follow all directions carefully.