Our synthetic formulas keep your cooling system cooler, cleaner, and stronger, restoring performance rapidly while protecting your engine in everything from daily driving to high-performance conditions.

Gasket Guard® utilizes cutting-edge nanotechnology, remaining in a completely liquid state until it encounters high-pressure CO₂. At that point, it activates and forms a seal as strong as copper yet as flexible as rubber, capable of withstanding extreme heat fluctuations.

This advanced method is a breakthrough in sealant technology, unlike conventional head gasket sealants that rely on clogging agents, which often block coolant passages and cause further damage.

Gasket Guard® delivers a 99% success rate, backed by a lifetime guarantee.

Repair your Head Gasket in 3 simple steps!

1. Pour in GASKET GUARD®: Ensure the engine is cold and pour the entire bottle directly into the radiator or expansion tank.
2. Start the engine: Drive the vehicle for 5 to 10 miles or run the engine at high idle for 30 minutes.
3. Drive away: Top up with fresh coolant if necessary and continue driving as usual.

With GASKET GUARD® Lifetime Warranty Guarantee, your head gasket protection is backed for life. If the seal ever fails, we’ll replace it free of charge. Register your product within 30 days of purchase to activate your non-transferable lifetime guarantee on GASKET GUARD® head gasket seal. Enjoy complete peace of mind today.