METALGUARD® H80

METALGUARD H80 is a heat transfer fluid additive package that is based on organic acid technology (OAT). It was designed for multi-metal systems and systems made entirely or partly of aluminum. Traditional heat transfer fluids are usually phosphate-based (like fluids made with METALGUARD H50) and have a relatively high pH compared to OAT chemistry. While phosphate-based fluids provide good protection for most HVAC systems, and other heating/cooling systems made primarily of steel with some copper, cast iron and brass, they are not well-suited for all-aluminum systems operating above 150°F (65°C), especially all-aluminum boiler systems.

METALGUARD H80’s organic acid-based formulation contains no nitrites, borates, or phosphates and provides a pH of 8.0-9.0 in 50% heat transfer fluid. It protects all commonly used metals, including aluminum, and it is compatible with most plastics and elastomers. Heat transfer fluids made with METALGUARD H80 can be used in any heating/cooling system, but it is the best choice for high-aluminum-content systems operating above 150°F (65°C). The organic acid salts used in METALGUARD H80 coat all metal surfaces for protection from corrosion. Azoles are included to supplement “soft” metal protection (copper, brass, solder and aluminum). Organic acid depletion rates are very slow, resulting in a fluid life at least as long as phosphate-based fluids without the necessity of boosting the phosphate content periodically.