Wolf’s Yellow Snow is a highly concentrated, foaming pre-wash designed to loosen debris and road grime from a vehicle’s surface before the washing stage. This pH neutral formula utilizes NATURAL solvents to break down contaminants and the thick, clinging foam helps to lift it from the surface for easy rinsing. Yellow Snow is a very economical pre-wash solution with effective dilution ratios of up to 1:20. Biodegradable! PH neutral and wax safe!