A heavy-duty all-purpose cleaner that cuts through heavy deposits of greasy dirt and grime from interior and exterior surfaces. 1 gal of TSP will make up to 16 gal of cleaning solution. Recommended for cleaning walls, woodwork, ceilings, concrete, metal, vinyl and aluminum siding. TSP phosphate-free cleaner requires no rinsing. Removes mildew stains when mixed with bleach. Apply by hand or with a pressure washer.