How do I apply Blue Devil head gasket sealant?

Flush the cooling system, drain old coolant, fill with plain water, add the full 32 oz bottle into the radiator slowly, then idle the engine at operating temperature for a full 50 minutes. Follow the manufacturer's instructions for best results.

Will this clog my radiator or heater core?

No. Blue Devil contains no solid or particulate matter. It flows freely through the cooling system and only activates at the leak site. Proper application following the manufacturer's instructions is important to avoid issues.

What types of leaks can this repair?

It is formulated to seal blown head gaskets, warped or cracked heads, heater cores, and freeze plugs. It works in both gasoline and diesel engines and bonds to metal, aluminum, cast, alloy, and plastic.

Blue Devil Head Gasket Sealant 32 oz

Name: Blue Devil Head Gasket Sealant (32 oz.) - 6 Pack
Brand: Blue Devil
SKU: BLU38386-6PK
Price: 333.61 USD
Availability: InStock

Blue Devil Head Gasket Sealant (32 oz.) - 6 Pack

$333.61

Usually ships the next business day

Blue Devil head gasket sealant, 32 oz bottles in a 6-pack. Permanent seal for blown head gaskets, cracked heads, heater cores, and freeze plugs.

Key Features

6-pack of 32 oz bottles of Blue Devil's full-strength 38386 head gasket sealant.
Sodium silicate formula forms a permanent chemical weld at the leak site.
Contains no solid or particulate matter that could clog the cooling system.
Bonds to metal, aluminum, cast, alloy, and plastic surfaces.
Works on blown head gaskets, cracked heads, heater cores, and freeze plugs.
Compatible with both gasoline and diesel engines.

Secure CheckoutFast Shipping631-982-0042

Product Details

For shops or fleet operations dealing with multiple head gasket repairs, this 6-pack of Blue Devil head gasket sealant gives you six 32-ounce bottles at a better per-unit cost than buying individually. Each bottle is the full-strength 38386 formula, the same product that has been Blue Devil's flagship head gasket repair for years.

Blue Devil uses a sodium silicate adhesive that forms a permanent chemical weld at the leak site. It bonds to metal, aluminum, cast, alloy, and plastic, covering the range of materials found in modern cooling systems. The formula contains no solid or particulate matter, so it will not clog passages, radiator tubes, or heater cores when used correctly.

Application requires flushing the cooling system, filling with plain water, adding the full 32 ounces into the radiator, and idling at operating temperature for 50 minutes. It works on blown head gaskets, warped or cracked heads, heater cores, and freeze plugs in both gasoline and diesel engines. Having six bottles on hand means you are ready for the next job without a parts run.