Concrete Cleaner Degrease 1 Gallon: Our material is a best seller because it is highly multipurpose, safe, and non-toxic. This product is in concentrate form that penetrates concrete and asphalt pores, lifting grease, oil , grime, and dirt from their surfaces without resettling. This product is perfect for power washing and other uses on concrete, asphalt, brick, stone, stucco, tile, grout, walls, vinyl siding, aluminum siding, and vinyl fences. The dilution ration is 6-12 ounces per gallon put out by your power washer. Use straight on really bad areas.