Metal compounds such as magnesium and calcium found in water form scale deposits on your machine parts with every wash. These deposits on the heating elements and other machine parts reduces efficiency and longevity of your washing machine. It fights corrosion caused by scaling deposits. It is a combination of mild acids and corrosion inhibitors. It acst instantly on stubborn scale deposits and flush them out with wash water. I therefore restore machine parts affected by scales to original condition and leave your machine drum sparkling clean. I am 100 percent biodegradable and appliance friendly.