Eufreeze OAT Yellow Universal Antifreeze Coolant - COD REUPR-321

The Eufreeze OAT Yellow concentrated universal protective antifreeze and engine coolant (package references PR001-321 and PR020-321 - product series COD. REUPR-321) is a premium organic acid technology (OAT) fluid recommended for all passenger cars, 4WD vehicles, and commercial transport vans. Designed to be used exclusively when diluted with demineralized water according to targeted sub-zero requirements, it provides a comprehensive triple-action defense: winter freeze protection, high-temperature summer anti-boil performance, and advanced anti-corrosion defense. Its specialized chemical formulation is strictly free from nitrites, amines, phosphates, silicates, and borates, completely preventing mineral scale formation, abrasive sludge, or radiator clogging while delivering up to 5 years of continuous total protection. Complying with rigorous international standards including ASTM D 3306, ASTM D 6210 Type I-FF, MB 325.5, CUNA NC 956-16 and suitable where FIAT 9.55523 and Iveco 18-1830-A002 specifications are mandated, it safeguards aluminum, cast iron, copper, brass, and elastomer seals.

Key Features and Construction Advantages

• 5-Year Certified Long-Life Protection: Advanced organic carboxylic acid inhibitors provide outstanding thermal stability without rapid depletion, enabling extended service flush cycles.
• Inorganic Salt-Free Clean Chemistry: 100% free from nitrites, amines, phosphates, silicates, and borates, eliminating gel dropout and abrasive mineral sludge in narrow heater cores.
• Triple Action Protection: Depresses the freezing point, raises the boiling threshold under pressure, and provides molecular-level electrochemical corrosion shielding.
• Universal Multi-Metal Compatibility: Outstanding defense for aluminum cylinder heads, cast iron blocks, brass heater fittings, copper cores, and solder joints.
• High-Yield Pure Concentrated Formula: Allows professional workshops to prepare custom dilution ratios tailored exactly to operating climates and manufacturer requirements.

Technical Specifications

Approximate Dilution Reference Table

Eufreeze OAT Yellow Percentage	Demineralized Water Percentage	Freezing Protection Level
33%	67%	Down to -18°C
40%	60%	Down to -26°C
50%	50%	Down to -38°C

Application Areas and Machine Suitability

Sector / Application Area	Operational Capabilities & Benefits
Passenger Cars, SUVs and 4WD Vehicles	Universal high-efficiency thermal protection for modern petrol, diesel, and hybrid passenger cars operating in mixed road and heavy 4x4 conditions.
Light Commercial Vans & Delivery Fleets	Optimized for urban and long-haul commercial vans (Fiat Professional, Iveco), maintaining full heat dissipation and a 5-year coolant life.
Fleet Maintenance Workshops	Cost-effective concentrated format for customizable on-demand mixing during major cooling flushes across mixed multi-brand fleets.

Operating Guidelines and Workshop Notes: As this is a pure concentrated formulation, never add the fluid undiluted into the engine cooling system: always dilute strictly with demineralized or deionized water according to the reference dilution table. Never use regular tap water to prevent limescale deposits and maintain inhibitor chemical stability. Always consult vehicle OEM manufacturer manuals to verify correct specification compatibility prior to use; completely drain and flush the cooling circuit with demineralized water before switching from older fluids. Never remove the pressure cap when the engine is hot or pressurized to avoid severe scalding hazards. Routinely check coolant concentration and freeze point when cold using an optical refractometer with an ethylene glycol scale. Store original containers tightly closed in a dry space away from direct sunlight, children, and domestic pets.