Zerex Original Green Low Silicate 50/50 Prediluted

Zerex Original Green 50/50 Prediluted Antifreeze/Coolant is a ready-to-use, low-silicate IAT formula that protects older passenger cars and light trucks from freezing, boiling, corrosion and deposits.

Designed and manufactured by Valvoline under the Zerex name, this 1-gallon prediluted coolant is OEM-approved for many GM, Ford, Chrysler, Hyundai, Kia, Nissan and Mazda applications that call for a green, low-silicate inorganic additive technology (IAT) antifreeze. It combines corrosion inhibitors with a balanced 50/50 mix of coolant and deionized water, so you can top off or refill cooling systems without additional mixing. The formulation avoids borates, 2‑EHA, amines and nitrites while keeping low silicate levels to protect radiators, water pumps and engine metals, including aluminum.

How does Zerex Original Green protect my engine from corrosion and deposits?

Zerex Original Green uses an inorganic additive technology that forms a protective barrier on metal surfaces to slow rust, scale and electrochemical corrosion. The balanced inhibitor package is tuned for older cooling systems and mixed-metal radiators, helping parts stay cleaner and extend service life.

• Special inorganic corrosion inhibitors for radiators, water pumps and hoses
• Low silicate content to reduce silicate-related deposits
• Formulated without borates, amines and nitrites
• Patented inhibitor package for extended protection

Is the 50/50 prediluted mix ready to use for my vehicle?

Yes — the product comes pre-mixed 50/50 with deionized water, so it’s ready to pour directly into the radiator or coolant reservoir. That eliminates guesswork and ensures freeze and boil protection down to the specified temperature without additional dilution.

• Pre-mixed 50/50 concentration for immediate use
• Protects down to approximately -34°F with proper mixture
• Saves time during top-offs and full coolant changes
• Reduces risk of mixing errors compared with concentrate

Will Zerex Original Green work in aluminum radiators and mixed-metal systems?

The low-silicate IAT formula is engineered to be safe and effective in aluminum components as well as mixed-metal cooling systems commonly found in older model cars and light trucks. Its inhibitor blend helps prevent galvanic corrosion across dissimilar metals while keeping surfaces free of scale.

• Compatible with aluminum, cast iron and mixed-metal systems
• Inhibitors help prevent electrochemical corrosion between different metals
• Helps maintain coolant flow by minimizing scale and deposits
• OEM-approved for many legacy vehicle specifications

How long will this antifreeze/coolant last before needing replacement?

Service life depends on vehicle, driving conditions and maintenance, but Zerex Original Green’s inhibitor package provides dependable protection when used according to manufacturer schedules. For older vehicles that originally specified IAT, routine checks and periodic replacement following OEM guidance will deliver the best results.

• Designed for routine service intervals recommended by OEMs
• Monitor coolant condition and replace per vehicle manual
• Use full system flush for contaminated or degraded coolant
• Maintains protection throughout typical service life when kept clean

Who is this for: Zerex Original Green 50/50 Prediluted Antifreeze/Coolant is targeted at owners and technicians working on older passenger cars and light trucks whose manufacturers specify a green, low-silicate IAT coolant. It’s ideal for routine top-offs, maintenance shops doing drain-and-refill services, and anyone who prefers the convenience of a ready-to-use gallon that meets OEM expectations for corrosion control, freeze/boil protection and system cleanliness.