Zep Envirowash is a versatile liquid cleaner, pressure-washing compound and heavy-duty detergent for use in a wide variety of difficult cleaning operations. Great for cleaning cars and trucks because this product does not contain any caustics, acids, phosphates or solvents. This clear thin liquid contains an unusually high concentration of wetting agents, alkaline builders, and water-softening agents that break up and disperse stubborn grease, grime and dirt. Cleaner/degreaser rinses with a minimal amount of water.