Freez-Therm is an inhibited ethylene glycol-based heat transfer fluid and antifreeze for chilled water, hydronic and other closed systems. It is formulated with a fluorescent green/yellow dye for leak detection and product identification and an industrial strength corrosion inhibitor designed specifically for HVACR systems. The corrosion inhibitor protects metals commonly found in both residential and commercial installations, including brass, copper, solder, steel and cast iron. Freez-Therm is a complete heat transfer fluid and freeze point suppressant. Many commercial and industrial closed water systems are required to operate while being exposed to varying extremes in temperature. And, many times these extremes may approach the freezing point or the boiling point of the water. As a result, use of a heat transfer fluid in order to suppress the freezing point or raise the boiling point becomes a matter of system design. In these applications, use of the heat transfer fluid will enable the system to operate at the desired operating temperature. In addition, the heat transfer fluid should contain a corrosion inhibitor to protect system metal as those types of systems are invariably troubled with corrosion. Inhibited glycols, ethylene or propylene, are typically the compounds used in these applications.