What Is HOAT Coolant? (Hybrid Organic Acid Technology – Explained)
HOAT (Hybrid Organic Acid Technology) coolant is an advanced antifreeze formulation that combines the long-life benefits of traditional organic acid technology (OAT) with added inorganic corrosion inhibitors for enhanced protection.
This chemistry provides superior defense against corrosion, scale buildup, cavitation, and thermal breakdown, making HOAT coolant ideal for heavy-duty diesel engines, mixed fleets, and extended service intervals.
Global Extended Life HD Universal is a premium HOAT antifreeze coolant designed to deliver reliable protection across a wide range of vehicles and equipment.
Why Choose Global Extended Life HD?
Global Extended Life HD universal antifreeze / coolant is a universal/global, hybrid organic acid technology (HOAT), extended life, low-silicate, non-phosphate product designed for automotive/light duty and heavy duty diesel applications. This is a HOAT extended life antifreeze/coolant that combines organic acid salts with conventional inorganic salts and azoles; this makes it compatible with all types of both extended life and conventional technology antifreeze/coolants.
This coolant is precharged, meaning that it contains a minimum of 1200 ppm nitrites. Its additives effectively control wet sleeve cylinder liner pitting/corrosion in heavy duty diesel engines. The primary corrosion inhibition system consists of a combination of salts of carboxylic and phosphono-carboxylic acids. These inhibitors deplete very slowly relative to conventional inorganic salt compounds, providing the extended service life of this antifreeze.
This product is low silicate and is free of phosphates and amines.
Product Features
- Extended service life of up to 600,000 miles, or 12,000 hours with proper maintenance
- Universal Antifreeze / Coolant formulated to be Low silicate & phosphate / amine free
- Compatible with all types of extended life and conventional technology antifreezes
- Meets Standards:
- ASTM D3306 (automotive/light-duty)
- ASTM D4985 (HD diesel/low silicate)
- ASTM D6210/11 (HD fully formulated & precharged)
- TMC of ATA RP 329/330
Applications Include
- In automobiles, light trucks, SUV’s, vans and other light duty applications, this product will provide a service life in excess of 5 years or 150,000 miles.
- In heavy-duty diesel applications (in which a formal monitoring and maintenance program is in place) it can provide a service life of 600,000 miles.* With the addition of our heavy-duty supplemental coolant additive at 300,000 miles.
Available Packaging
20L Pail
205L Drum
1000L Tote
FAQ
What does HOAT stand for?
HOAT stands for Hybrid Organic Acid Technology. It is a type of antifreeze and coolant formulation that combines organic acid inhibitors with selected inorganic additives to provide long-lasting corrosion protection.
What is HOAT coolant used for?
HOAT coolant is used to protect engines from:
- freezing and overheating
- corrosion and rust
- cavitation damage
- scale and deposit formation
It is commonly used in heavy-duty diesel engines, commercial fleets, and mixed vehicle applications.
What is the difference between HOAT and OAT coolant?
HOAT coolant combines the long-life properties of Organic Acid Technology (OAT) with additional corrosion inhibitors for enhanced protection in demanding operating conditions.
OAT coolants typically rely solely on organic inhibitors.
Can HOAT coolant be used in mixed fleets?
Yes. Universal HOAT coolants are often designed for multi-vehicle compatibility, making them ideal for mixed fleets and equipment operations.
How long does HOAT antifreeze last?
Extended-life HOAT coolants can often provide long service intervals, in the case of Global Extended Life HD – Up to 600,000 miles in heavy duty diesel applications.
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