Prestone® Stop Leak Additive Cooling System - 11oz.

Prestone® Radiator Stop Leak’s patented formula quickly stops leaks in radiators, water pumps, and heater cores, while also protecting against pitting and corrosion. Designed to help defeat heavy rust and scale deposits in neglected cooling systems. Premium 2-in-1 formula designed for either a quick flush or for a heavy-duty cleaning. It removes rust, corrosion, scale, and solid materials from the cooling system to help prevent overheating, a leading cause of engine failure.