Zerex Heavy-Duty Antifreeze Coolant 50/50 Ready-to-Use Pink 1 Gal — Low-Silicate Corrosion Protection

Zerex Fully Formulated Pink Heavy Duty 50/50 Ready-to-Use Antifreeze/Coolant is a pre-mixed, low-silicate coolant engineered to protect heavy-duty diesel engines from corrosion, cavitation, freezing and overheating.

This one-gallon, ethylene glycol-based coolant arrives factory-mixed in a 50/50 ratio with deionized water so you can pour and go—no measuring or dilution needed. The low-silicate, inhibitor-rich chemistry is targeted at the needs of heavy-duty diesel platforms (Cummins, DDC, MACK, Navistar, Paccar) and is commonly accepted as a universal heavy-duty coolant. It includes rust and scale inhibitors plus a defoamer to preserve seals, hoses and original finishes, and is batch-tested in labs and fleets for real-world durability.

How does Zerex protect heavy-duty engines from corrosion and cavitation?

The formula is pre-charged with advanced corrosion inhibitors that form a protective film on metal cooling components. That film reduces electrochemical attack, minimizes pitting and helps prevent cavitation damage to water pumps and cylinder liners.

• Low-silicate chemistry suited to heavy-duty engine specs
• Scale and rust inhibitors keep radiator passages clear
• Protects common metals used in trucks, including aluminum

Is this antifreeze ready to use, and how does the 50/50 mix benefit me?

This product comes pre-diluted at a 50/50 ratio with deionized water, eliminating dilution errors and making installation quick and simple. The factory blend provides reliable freeze and boil protection within typical ambient ranges for heavy-duty vehicles without additional coolant additives.

• No onsite mixing—reduces contamination risk
• Balanced freeze/boil performance for mixed climates
• Consistent inhibitor concentration for predictable protection

Will Zerex harm gaskets, hoses, plastics, or vehicle finishes?

The coolant contains a high-quality defoamer and a formulation designed to be safe for the elastomers and plastics used in modern cooling systems. When used according to label instructions, it won’t degrade gaskets, hoses, or painted surfaces while still delivering corrosion control.

• Defoamer reduces foaming that can damage seals
• Formulated to be compatible with common cooling system materials
• Contains denatonium benzoate (30–50 ppm) as a bittering agent for safety

How long will this coolant last in service?

Zerex Fully Formulated Pink Heavy Duty Coolant carries a conservative durability guideline when used per label: up to 3 years, 150,000 miles or 3,000 engine hours. Regular system checks and periodic coolant analysis extend protection and help spot contamination early.

• Guaranteed performance window: up to 3 years or 150,000 miles
• Batch-tested for consistency across production runs
• Fleet-proven in heavy-duty applications under real conditions

Who is this for: Zerex Pink Heavy Duty 50/50 Ready-to-Use Antifreeze/Coolant is intended for fleet managers, owner-operators and technicians running heavy-duty diesel engines where low-silicate, inhibitor-rich protection is required. It suits applications calling for a pre-mixed, maintenance-friendly coolant that supports long drain intervals and broad metal compatibility, including aluminum. If you want a plug-and-play coolant that meets many heavy-truck OEM expectations and simplifies service intervals, this product is tailored to those needs.

Note: Always follow engine manufacturer recommendations and test coolant concentration and quality periodically. This description is informational and does not substitute vehicle-specific service instructions.