Can You Use Blue Devil Twice? – Head Gasket Sealer Pros & Cons

You pull into the car park and hear the clunk that sets your teeth on edge. The engine’s a bit rough when you turn it off and see smoke coming out of the exhaust.

When this happens, the first thing to do is check if it will cost a fortune or take forever to fix. You know it won’t be long before the car stops working. Your engine acts up and sputters. The timing, electricity, or ignition- all of them are messed up.

The cost of repairing your car’s engine is much higher than purchasing a head gasket sealer. That is why you should ensure that your car is well-maintained and cared for properly.

One way to do this is by replacing your old gasket seal with the premium Blue Devil Head Gasket sealer. It is easy to use and helps save you a lot of money.

This article lays out the tips and tricks for using Blue Devil sealer. Also, you will learn whether you can use Blue Devil twice to save yourself from unforeseen troubles.

What Is the Blue Devil Head Gasket Sealer?

Blue Devil head gasket sealer is a premium repair solution for your vehicle. You can use it for sealing and mending cracked and warped heads and blown head gaskets. Also, it works for leaking radiators and cores of the heater as well as freeze plugs.Blue Devil Head Gasket Sealer

If you are a newbie in car repair, one thing that might pop in your head is whether the Blue Devil sealer repairs every kind of vehicle. Notably, this head gasket sealer is perfect for your car if it has a four or six-cylinder engine.

If you hear unexpected and odd sounds from your car’s engine, you might see a blown head gasket instead of a clogged engine.

The head gasket is responsible for preventing the leaks of engine oils or coolants into the cylinders. In addition, the head gasket helps in sealing the combustion gasses within the cylinders.

So, when your car has a blown head gasket, you will spot smoke discharges and weird hiccup sounds coming out of the engine. All these things happen because of the failure of the head gasket to prevent leaks in the cylinders.

When you send your car to the mechanic to diagnose and repair a blown head gasket, your bill might be up to $2,500 or even more. Nevertheless, if you use a head gasket sealer and occasionally check the head gasket, you can significantly mitigate this cost.

You can find many gasket sealers in the market, but auto repair experts recommend Blue Devil head gasket sealers.

Undoubtedly, it is a first-rate solution for effectively sealing leaks and mending cracked and warped heads. Also, it prolongs the engine’s life and efficiency.

Can You Use Blue Devil Oil Stop Leak Twice?

You might have used the sealer once and noticed excellent results, but the oil is leaking again after a while. So if you want to use the Blue Devil sealer again, you probably wonder whether you should.Can You Use Blue Devil Twice

You can still use a Blue Devil head gasket sealer if the oil leaks after the first treatment. This product is pure from petroleum distillates, notorious for destroying seals after temporarily expanding them.

So, when you use Blue Devil sealer on your head gasket, you can rest assured that the oil will leak no longer. All you need to do is follow the directions on the bottle carefully while applying the product.

Also Know: Can You Add Oil to a Hot Engine?

How to Use a Blue Devil Head Gasket Sealer?

Before you start repairing your head gasket, you should consider its extent of impairment. If the gasket is heavily disfigured, you will need to have your car checked at the mechanic’s as Blue Devil cannot fix such gaskets.

When you notice minor damages in your head gasket and want to rectify the issue, the Blue Devil head gasket sealer should be your primary choice.Blue Devil Head Gasket Sealer

Before you start using the Blue Devil head gasket sealer, you need to do the following:

  • First, clean the coolant system. For this, you will need to remove the thermostat. Then, drain the matter from the hose in the bottom.
  • After these steps, pour water through the coolant system and repeat the process three times. By doing so, you will get rid of any remaining contents of the old coolant.
  • Next, start filling the coolant system with water but up to a volume where it has the capacity for Blue Devil to be poured in.
  • Next, you will need to remove the radiator cap and ignite the engine with the heater set to maximum level. This step will help the engine cool down before you spill Blue Devil into the system.
  • Later, you can pour the product gradually into the coolant chamber. While at it, you must ensure that the process takes at least one minute to pour a whole bottle. After emptying the bottle, you will put on the cap and leave the engine after turning it on for 50 minutes.
  • Then, allow the engine to attain a lower temperature and replace the thermostat with the new one.
  • Lastly, do not mind topping up with antifreeze and taking your car for a smooth test drive!

Figure Out More: How to Fix Brake Fluid Leak

Do You Have to Remove the Thermostat to Use Blue Devil?

Yes. You must remove the thermostat before pouring the Blue Devil into the radiator. It is necessary for a perfect flush. Also, as it is written in the instructions label, you must follow the points for correctly using the sealer.

Can You Use Radiator Sealant Twice?

Yes, you can use the radiator sealant more than once. However, you must ensure that you are completely flushing the old coolant. Then, refill the system before using the radiator sealant again. Unfortunately, if you fail to do so, you will clog the heater core, thermostat, and radiator.

Is Blue Devil a Permanent Fix?

Whether Blue Devil is a permanent fix depends upon the level of impairment your head gasket has. As for minor leaks, the product works as advertised. It causes permanent fixes in the head gasket as long as it has no serious damage.

Contrary to that, Blue Devil still works for the head gasket on the verge of a complete loss. However, the duration of its efficacy may be truncated.

How Long Does Blue Devil Last?

As long as you follow the instructions on the product strictly while installing the Blue Devil head gasket sealant, your engine will work properly for up to 9 months.

Can You Use Blue Devil Sealer Without Seeking Help From a Mechanic?

Blue Devil Pour-N-Go head gasket sealant is hands down the best sealant that permanently seals various cracks on the engine.

The best part is that you can pour Blue Devil in the radiator without seeking auto repair services. In short, the product lives up to its name – Blue Devil Pour-N-Go!


Sometimes you don’t trust car mechanics when you have engine problems. It is okay to be skeptical about their diagnosis.

Another significant thing is your budget. Often Paying for a mechanic often feels like splurging with savings.

The Blue Devil Head Gasket Sealer might be the perfect solution for anyone who feels frustrated with these issues.

As for using the product, you can surely use Blue Devil more than once. However, you must ensure to clean the coolant system properly. This way, you avoid any possible clogs in the thermostat, radiator, or coolant.