SD-20 is a concentrated, synthetic all-purpose cleaner desig ned to accomplish an unusually broad range of maintenance tasks at low cost. Formulated without soap, free alkali, or a mmonia, SD-20 is an "all-surface cleaner" and may be used on floors, painted walls, woodwork, marble, plastic, metal a nd other hard surfaces impervious to water. SD-20 mixes well with hot or cold, hard or soft water and may be applied wit h a sponge, mop, or other appropriate equipment. The product was authorized for use by the USDA in Federally inspected m eat and poultry plants. Departments of Transportation in nearly every State approve the use of SD-20 as an asphalt release agent.