Blue Devil Head Gasket Sealer (16 oz) - 6 Pack

A blown head gasket is one of those repairs that can cost thousands at a shop, which is why Blue Devil Head Gasket Sealer has become one of the most well-known chemical repair products on the market. This six-pack gives you six individual 16-ounce bottles, each one a complete treatment for a 4 or 6 cylinder engine.

Blue Devil uses a sodium silicate formula that contains no solid or particulate matter, so there is nothing to clog your cooling system, radiator, or heater core. When you pour it into the cooling system, the formula circulates with the coolant and is drawn to the leak point by the heat and pressure differential. Once it reaches the breach, it hardens into a permanent seal. It bonds to metal, aluminum, cast alloy, and plastic, making it versatile across different engine and cooling system materials.

Beyond head gaskets, Blue Devil also seals warped or cracked heads, leaking heater cores, and freeze plugs. The key to a successful repair is following the instructions carefully: flush the cooling system with plain water first, remove any antifreeze, then add the sealer and run the engine at operating temperature for 50 continuous minutes with the heater on maximum. The formula is compatible with both gasoline and diesel engines.

This six-pack format is useful for shops, fleet maintenance, or stocking up for multiple vehicles. Each bottle is a standalone treatment, so they store easily until needed.