This is a "safe finish cleaner". It is designed to clean over the road tractor/trailers and other types of commercial vehicles. It will clean painted surfaces, polished aluminum, anodized aluminum, & chrome without damage. This great truck wash detergent will remove most carbon stack stain and magnetic road film from trailers without brushing. It will work in cold water as well as hot water and rinses at any temperature. This product may be metered at 1:70 for hot water or 1:35 for cold water, and should be effective in hard water to about 20 grains of hardness. USDA approved ingredients.