Super Clean Deck & Siding Pressure Washer Concentrate. The heavy outdoor grime can be extremely tricky to remove. That's where Super Clean Deck & Siding Pressure Washer Concentrate comes in to make the job easier with its fast, penetrating action. To use Super Clean Deck & Siding Pressure Washer Concentrate, first, mix the concentrate with water according to the manufacturer's instructions. Then, apply the solution to the surface you want to clean using a pressure washer. Allow the solution to sit for a few minutes to break down the dirt and grime. Finally, rinse the surface with water using the pressure washer at the appropriate power setting. Powerful, Dirt & Grime Doesn't Stand A Chance. The power of your pressure washer and Super Clean combined makes quick work of grease and grime on almost any surface. Apply, soak and blast the grime away. The Super Clean Deck & Siding Pressure Washer Concentrate is a real workhorse cleaner.