Zerex 4 in 1 Radiator Service - 22 fl oz

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