Featuring FMX® Technology that provides unsurpassed protection and performance.

Specially blended formula to quickly stop radiator leaks. Product mixes easily and readily with any coolant. Does not contain any harmful metal.

Benefits of MAG 1® Radiator Stop Leak include:

• Super-fast acting.
• Effectively stops cooling system leaks and antifreeze loss.
• Mixes readily with coolant.

Evolutionary Performance™

OEMs continue to evolve engine and vehicle systems. One brand has evolved right alongside – MAG 1®. Only the most advanced automotive fluids meet the difficult challenges of effectively balancing performance, strength and durability.

Powerful Chemistry and Performance

MAG 1® helps improve your vehicle’s longevity and performance.