Boost your pressure washing power with this half gallon of premium detergent from Martha Stewart. Formulated just for use with your pressure washer to make your home, car, deck, boat and more sparkle and shine! This essential, biodegradable pressure washing concentrate is perfect for use on multiple outdoor surfaces — from wood, to brick, to metal and more. Simply add to your pressure washer's detergent tank, dilute, spray, and watch the gunk and grime wash away!