Presta Marine's DeckSpray All Purpose Cleaner is a powerful non-skid cleaner that quickly removes black streaks, heavy soils, grease and grime. Recommended for wax removal before applying HydroProtek Ceramic Coating. Can be used on aluminum.POWERFUL CLEANER AND DEGREASER: Quickly removes black streaks, heavy soils, grease and grime from flat and non-skid surfaces.HIGHLY-CONCENTRATED FORMULA: Removes dirt, grease and water-line stains. Effectively cleans stubborn bilge and fish well stains.VERSATILE USES: All Purpose Cleaner is ideal for cleaning fiberglass, metal and painted surfaces. DeckSpray can be diluted for greater economy and use.RECOMMENDED FOR WAX REMOVAL: Use DeckSpray prior to applying HydroProtek Ceramic Coating.NON-CAUSTIC, PHOSPHATE-FREE & BIODEGRADABLE: DeckSpray is non-caustic and can be used on aluminum. Our cleaner is environmentally safer than other formulas and can be used in marinas.