... detergent and metal cleaner.instead of STPP. Sodium metasilicate anhydrous is strongly alkaline, having strong capacity of cleaning, ... metal (zinc, aluminum, etc.). Therefore, sodium metasilicate anhydrous is widely used for the manufacture of a variety of ... maintenance agent, water retention agent, etc.PropertiesSodium metasilicate anhydrous is an inorganic white powder or crystalline granules, non ...