Finish Dishwasher Salt helps soften water to prevent limescale and watermarks, giving 100% better machine protection and helping your appliance last longer. It also helps prevent stains and watermarks accumulating on your dishes and glasses. This trust formula has been specially designed for your dishwasher with 99% purity, whereas other salts may contain impurities that will damage the ant-cal of your dishwasher. Combined use of Finish Additives with Finish detergents will produce increased dishwasher performance for perfectly clean dishes. At least 2x better limescale deposit protection when using Finish Salt with Finish detergent vs using Finish detergent alone. To save water, energy, and CO2, you should scrape instead of pre-rinsing, fill the machine to capacity, and use the 50° or lower temperature programs. Features and Benefits 100% better machine protectionFinish Dishwasher Salt softens water to prevent limescale and watermarks, helping your appliance last longer. 99% purity