OptiShield Original formula has been formulated to control corrosion in systems circulating fluid to industrial machines such as lasers, welders, machine tools and other process equipment. It provides broad corrosion protection for systems with a range of materials including copper, brass, aluminum, tin, ferrous metals, lead, and other yellow metals. OptiShield Original formula is pH basic and provides an unfriendly environment for algae. When used as directed OptiShield Original formula is a safe, effective solution for most general industry applications.