Zerex 4-in-1 Radiator Service is a solvent-free formula designed to help improve the vehicle's cooling system efficiency by removing rust, scale and oily residue while protecting against new deposit formation in just 10 minutes.
- Helps remove radiator solder bloom, rust, scale and other deposits that flushes miss
- Compatible with all antifreeze coolants and can be used on all cooling system metals, including aluminum
- Reduces engine coolant and oil temperatures for cooling systems with initially plugged radiator tubes and passages
- Protects against the accumulation of cooling system deposits
