Wynn’s® Radiator Sealant is designed to protect against coolant loss by stopping most leaks from the radiator, heater core, and engine block core expansion plugs, as well as seepage from the head gasket. Wynn’s® Radiator Sealant is added to new engine coolant after a complete cooling system exchange service or to the cooling system between scheduled maintenance services

• Stops Common Radiator & Cooling System Leaks
• Protects Against Coolant Loss
• Will Not Clog Radiator Cores
• Compatible with All Standard, Extended-life, and Hybrid Coolants
• Undyed for Compatibility with Antifreeze of Any Color