CITRUS Xterior is an economical citrus cleaner formulated for the cleaning of exterior vinyl, aluminum and wood siding for residential and commercial buildings. It is very effective in cold or hot water, also for use in the high pressure washing of mobile homes, RV's, trucks, trailers, buildings, etc. It is an excellent pre-spray for extremely difficult cleaning jobs and will clean engines, white wall tires, stainless steel, floors, walls and countertops. The corrosive inhibitors and water softeners in this product help prevent rusting of ferrous metals and scale build-up in heating coils. This product can be used with diluted bleach or sodium hypochloride. Best dilutions range from 1 to 5 parts cleaner to 50 parts water.