BlueDevil Radiator & Block Sealer

What kind of radiator sealer does bluedevil use?

BlueDevil Radiator & Block Sealer Brand: BlueDevil Products 3.9 out of 5 stars81 ratings | 15 answered questions Price: $28.71 Enhance your purchase This fits your . Make sure this fitsby entering your model number. Permanent repair for radiator and block leaks. Works effectively on plastic, aluminum and/or metal radiators

What do you need to know about Blue Devil products?

I bought a bottle of radiator and engine block sealer to fix a coolant leak, after using my engine would not start, I just rebuilt my engine and started fine until I used their sealer. I tried to start it twice and now am scared to attempt to start it again because it sounded that bad and I’ve never heard a car sound like this. … Read More product…

What kind of sealer do I need for my radiator?

BlueDevil Radiator & Block Sealer is an easy-to-use formula that will repair and seal leaks in radiators and/or engine blocks. It does not contain solid or fibrous materials and will not clog or harm cooling systems. It will bond to plastic, cast iron, aluminum, alloy or metal. BlueDevil Block Sealer is compatible in gasoline and diesel engines.

What happens if you add Blue Devil to your car’s cooling system?

This type of sealant wouldn’t do anything to a car which didn’t have a head gasket leak. Other sealers work by adding a material or hardening in some way. They may, for example, add some sort of "silt" to the coolant system which is deposited around the system. Adding too much of this is enough to cause blockages in heater matrixs and radiators.


This car radiator sealant offers a permanent solution for the leaks in your vehicle and has been specially designed to fix radiator and block leaks. The BlueDevil Radiator & Block Sealer is made in the USA and claims that permanent repair is guaranteed. The product works amazingly well on plastic, aluminum and metal radiators and is super safe and easy to use.

Made from a special formula with no solid or fibrous materials this product won’t harm or clog your cooling system. Instead, it bonds to plastic, cast iron, aluminum, alloy or metal and is compatible with gasoline and diesel engines. When this formula bonds to the weak points in your cooling system it then creates a permanent airtight seal that will work with the heat of your engine to expand and contract. You can add this directly to your cooling system…you just literally pour and go!


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