Once the engine is started and reaches operating temperature, GASKET GUARD® is distributed through the engine and starts actively seeking out CO₂ using advanced nanotechnology. When damage is detected, GASKET GUARD® is drawn into the damaged area and seals the crack through a thermo-chemical bonding action. The new bond is as strong as copper and as flexible as rubber, allowing it to withstand extreme thermal expansion and provide a permanent seal.

Yes. GASKET GUARD® is designed for permanent repair and protection. It bonds at a molecular level to the affected areas, forming a seal that can withstand extreme pressure and temperature variations. Thousands of successful real-world tests have proven its long-term reliability.

GASKET GUARD® is a clear formula that contains no fibrous materials or particles that could clog engine coolant passages. You can see that for yourself — just look through the bottle. Its smooth, particle-free formula ensures unrestricted coolant flow while still forming a permanent, heat-activated seal where it’s needed.

Absolutely. GASKET GUARD® remains active in the system to provide ongoing protection against future leaks, corrosion, and overheating. It’s compatible with all types of coolant, antifreeze, seals, and gasket materials.

1. Ensure the engine is cool.
2. Shake the bottle and pour the full contents into the radiator or expansion tank.
3. Start the engine and let it idle or drive for 5–10 miles (or 30 minutes at high idle).
4. Top up with fresh coolant if necessary.
GASKET GUARD® will begin sealing immediately and continue to protect your engine for years.

GASKET GUARD® works with all petrol and diesel engines, including cars, vans, trucks, 4x4s, and even marine engines. It’s compatible with all cooling systems, regardless of coolant type or material composition.

• Up to 2.5L engine – 1 bottle
• 2.5L to 4L engine – 2 bottles
• Over 4L engine – 3 bottles

Yes! GASKET GUARD® is backed by a 100% money-back guarantee. If it fails to fix your head gasket, you get a full refund — no questions asked.

Yes, many users add GASKET GUARD® during routine coolant changes to prevent head gasket and cooling system issues before they occur. For ongoing protection, add half a bottle every six months.