A concentrated acid rinse additive. It has been specially formulated for use in a wide range of ware washing machines and washer disinfectors. The product contains a blend of low foam surfactants for rapid and streak free drying and for foam control in the dishwasher. It also contains scale control agents to keep the machine free from scale in medium hard and hard water conditions. The product is also an excellent soaker for blood, rust and other stains encountered in medical instrument cleaning. A concentrated low foaming machine rinse additive with scale control properties.