Design Engineering Radiator Relief Cooling System Flush 16 oz — Restores Coolant Flow, Removes Rust & Sludge

DEI Radiator Relief Cooling System Flush is a 16-ounce treatment that removes rust, scale, and sludge to restore coolant flow and improve radiator heat transfer.

Left unchecked, deposits in a cooling system limit coolant circulation and reduce the radiator’s ability to shed heat. Design Engineering's Radiator Relief is formulated to break down corrosion, mineral scale, and organic sludge so the radiator, heater core, and cooling passages can operate closer to their original efficiency. The product is safe for common radiator metals and compatible with all antifreeze types, making it suitable for routine maintenance or when diagnosing overheating symptoms.

How does this flush improve cooling performance?

The treatment chemically loosens and disperses built-up rust, scale, and sludge so they can be drained from the system. Clearing these blockages restores coolant flow and improves thermal contact inside the radiator and passages, which helps the cooling system remove heat more effectively.

• Breaks down rust and mineral deposits that restrict flow.
• Removes sludge from radiator cores and heater hoses.
• Improves coolant circulation for better heat exchange.

Is Radiator Relief safe for different radiator materials and coolants?

Radiator Relief is formulated with corrosion inhibitors and anti-foaming agents to protect common radiator materials like cast iron, aluminum, copper, and brass. It is compatible with ethylene- and propylene-glycol based antifreezes and can be used in automotive, marine, and light industrial cooling systems without harming seals or hoses when used as directed.

• Safe on aluminum, copper, brass, and cast-iron radiators.
• Works with all standard antifreeze and coolant mixtures.
• Contains corrosion inhibitors to limit future metal attack.

How do you use the 16 oz treatment correctly?

Application is straightforward: add the specified dose to the radiator or coolant reservoir, run the engine to circulate the product, then drain and flush the system before refilling with fresh coolant. Recommended dosing is 1 oz per quart of coolant; follow vehicle manufacturer guidance for volumes and disposal procedures.

• Add directly to the radiator or overflow tank per dosing ratio.
• Run engine to circulate and allow the formula to work on deposits.
• Drain, flush thoroughly, and refill with new coolant after treatment.

Will this prevent future corrosion and scale buildup?

While Radiator Relief removes existing deposits and includes inhibitors to slow new corrosion and scale formation, it works best as part of a regular maintenance schedule. Periodic treatment and proper coolant replacement keep pH balanced and additives refreshed to reduce the rate of future buildup.

• Contains inhibitors that slow subsequent corrosion.
• Helps maintain pH balance to limit acidic damage.
• Best used periodically as preventative maintenance.

Who is this for: DEI Radiator Relief Cooling System Flush is intended for vehicle owners, mechanics, and fleet managers who need a simple, effective way to restore radiator efficiency and address overheating contributors. It is suitable for cars, trucks, marine engines, and light industrial equipment that use standard antifreeze, and for anyone performing routine coolant system service or troubleshooting reduced cooling performance.