Hydronic System Cleaner; Cleaner Type Liquid; Container Capacity 1 Gallon; Composition Water, Sodium Nitrite, Sodium Metasilicate, Sodium Tetraborate, Sodium Hydroxide, Sodium Nitrate; Application Aluminum, Iron, Copper, Brass and Stainless Steel; Color Violet; pH Value 12; Vapor Pressure 17.5; Vapor Density 0.67; Density 1.088; Specific Gravity 1.090NOBURST® Hydronic System Cleaner removes scale, corrosion, organic material, dirt, debris, and bacteria from hot water, closed loop systems. It can be used in new and operational installations. Cleans aluminum, iron, copper, brass, and stainless steel. Contains no TSP, acids, or heavy metals. Suitable for use with ONIX and PEX tubing. Use one gallon for every 50 gallons of system capacity.