MoCOOL is a radiator additive which will reduce cooling system temperature by as much as 15°C (30°F). Packaged in 500ml. Concentrated formula that is mixed with distilled water for immediate use. Mix with water at 5% (20:1) Do not use straight out of the bottle. TYPE OF USE: This performance additive offers better heat transfer than normal coolants. The unique formula also contains rust and corrosion inhibitors. Best used for overheating engines or racing conditions. Inhibits corrosion and water pump protection. Seal, rubber and plastic part friendly!