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Ranking Top Gasket Patches That Save Drivers Thousands

Cameron EittreimDecember 10, 2019

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16: Permatex 20539 Indian Head Gasket Shellac Compound

Permatex is a brand that makes more than just head gasket sealer. The brand also makes various forms of gasket sealant for a variety of jobs. The Permatex 20539 Indian Head Gasket Shellac Compound is a winning combination of value and effectiveness. This specific formula seals gaskets up to 350F, so needless to say, even the hottest engines can get sealed up. The same thing goes for full-on head gasket failure.

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The Permatex 20539 Indian Head Gasket Shellac Compound comes in a pourable bottle and it dries. This fluid is also resistant against diesel fluids and auto shop fluids, which makes it suitable for fixing a failed head gasket repair as well. Permatex is a brand that you can trust. If you want to give your car a fighting chance, this is how.

Buy it here: Permatex 20539-12PK Indian Head Gasket Shellac Compound, 2 oz. (Pack of 12) $24.46

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15: ATP AT-205 Re-Seal Stops Leaks, 8 Ounce Bottle

ATP is a brand that you probably don’t hear too much about. But the company makes a line of different patch fluids that you can use in your car. Ideally, the company focuses on transmission patches but there are also liquids that you can use on an engine as well. The ATP AT-205 Re-Seal Stops Leaks, 8 Ounce Bottle is a quick and easy to use formulation for head gasket leaks and a variety of other leaks. The setup is pretty easy, you just pour it into the designated reservoir.

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In addition to that the benefits of using this by itself, it can be mixed with most synthetic oils. This fluid will not overswell and blow the seals like a lot of sealants will. The main problem with a lot of these sealants is that the fluid will cause rubber seals to expand and get clogged. The AT-205 doesn’t clog your seals and you’ll get an even seal in your head gaskets.

Buy it here: ATP AT-205 Re-Seal Stops Leaks, 8 Ounce Bottle $11.99

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14: K-Seal ST5516 HD Multi-Purpose One Step Permanent Coolant Leak Repair

The K-Seal brand is known for having stellar products that will seal your head gasket. The ST5516 is an improvement over their original formula that was designed for heavy-duty applications. This would be a fluid you would use if you had a heavy-duty pickup truck. The mixture is designed for diesel engines and gasoline engines. There is no flushing involved with this fluid which means that you can do the job in about an hour. ST5516 does more than just seal your head gasket. It also works to seal freeze plugs, cracks in the radiator, and more.

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If you are experiencing any type of leaks in your heavy-duty truck, you can’t afford to be out of commission. Therefore using the K-Seal ST5516 HD Multi-Purpose One Step Permanent Coolant Leak Repair is a great choice for anyone who has to work their vehicles. Just pour and go and you’ll be back on the road in no time.

Get it right here: K-SEAL Coolant Leak Repair ST5516 Heavy Duty 16oz, Multi-Purpose Formula for Truck/Tractor Coolant Leaks in the Radiator, Head Gasket, Water Pump Casing & Heater Core, A True Pour & Go -Trade Trusted $18.55

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13. Head Gasket Sealer for 4 Cylinder Engines - Steel Seal

Small cars tend to get the worst rap when it comes to engines blowing a head gasket. We give our small commuter cars a lot of usage, and then we get upset when the engine finally gives way. If you have a better car with a four-cylinder engine the head gasket repair can cost more then the car. The Head Gasket Sealer for 4 Cylinder Engines – Steel Seal is made for patching the engines in small cars. You’ll pour in the gasket mix and it will bring your small car back to life in no time. You want to use this when the engine is hot, as with other liquids.

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The steel formula forms a seal in all of your gasket areas. This is also ideal if you have a cracked head because that is where head gasket leaks can start. The Head Gasket Sealer for 4 Cylinder Engines – Steel Seal is an excellent formula that will get your car back onto the right track.

Buy it here: Steel Seal Blown Head Gasket Fix Repair Sealer - 6 Cylinder $119.95

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12. CRC 401016 Metallic Block Seal-16 Oz.

There are times when a head gasket leak can be on the last stages and nothing will patch it. If you have pushed your engine this far, don’t stress, there still might be hope. CRC is a brand that makes extreme head gasket sealants. The CRC 401016 Metallic Block Seal-16 Oz. is made to withstand extreme pressure from the engine that you might encounter. The generic-looking can house a fluid that is much more advanced then you might think. This fluid is unique because it seals cracks in cast iron and aluminum heads, as well as the rest of the cooling system.

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Even if you have a small radiator leak the CRC 401016 Metallic Block Seal-16 Oz. could potentially save your ride. If you have a severe leak and your car is reaching extreme temperatures, give the CRC 401016 Metallic Block Seal-16 Oz. a try. You might just get your car back on the road.

Buy it here: CRC K&W 401016 Block Seal Permanent Metallic Block & Radiator Seal - 16 Oz $15.53

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11. Bar's Leaks J-100 Professional DiFM Cooling System Treatment

There’s no doubt that cooling system leaks can be a problem. If your vehicle is showing signs of a cooling system leak or a faulty head gasket, Bar’s has something that will help. The Bar’s Leaks J-100 Professional DiFM Cooling System Treatment is different than a liquid that you dump down into theirs. These come in the form of tablets that you dump into the cooling system. The tablets patch a range of different issues such as cracked hoses, radiator lines, and more.

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The Bar’s Leaks J-100 Professional DiFM Cooling System Treatment also works to lubricate the water pump, which can cause a lot of overheating issues. If you think that the bearings in your water pump are going out or your vehicle is just running hot, give the Bar’s Leaks J-100 Professional DiFM Cooling System Treatment a try.

Get it right here: Bar's Leaks J-100 DiFM Cooling System Treatment - 5 Grams $21.10

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10. Head Gasket Sealer for 8 Cylinder Engines - Steel Seal

Steel seal markets a brand of head gasket sealer that is meant for four-cylinder engines. And that product works great, but what if you want the same results in a larger engine, Steel Seal also sells a sealant product that is designed for big eight-cylinder engines as well. The two-pack of the sealant uses the same pour-n-go technology. The brand has a 99.9% success rate and the fluid is said to not block the heater core, which a lot of fluids do. Nothing is worse than not having a heater in the middle of winter.

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The Head Gasket Sealer for 8 Cylinder Engines – Steel Seal could very well save your V8-powered work vehicle or the family SUV. This product is a little more expensive than the others, but with all of the positive reviews, it speaks for itself.

Buy it right here: Head Gasket Sealer for 8 Cylinder Engines - Steel Seal $119.95

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9: Hi-Gear HG9048s Insta-Seal Permanent Block Sealer - 8 fl. oz.

A lot of the time, a car can overheat from more than just the head gasket. If you are having trouble with a radiator then it might be time to find a new sealant as well. The Hi-Gear HG9048s Insta-Seal Permanent Block Sealer – 8 fl. Oz. is an important aspect of your engine maintenance because it works to seal the block. This stops overheating problems at their core and gets your car back in the running of things. The Hi-Gear HG9048s Insta-Seal Permanent Block Sealer – 8 fl. Oz. is an impressive product that you’ll use to get your car back on the road.

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The great thing about this sealant is that it seals cracks in plastic too. Now you’ll be able to save all of those plastic pipes in your Chrysler or other domestic vehicles. This fluid also manages to seal rubber hoses, which could help eliminate costly radiator hose replacements.

Buy it right here:Hi-Gear HG9048s Insta-Seal Permanent Block Sealer - 8 fl. oz. $7.74

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8. Irontite All Weather Seal, Blue, 16 oz

Looking for a budget-minded seal? The Irontite All Weather Seal, Blue, 16 oz is a great option for those who are looking for a cost-effective solution to fixing a blown head gasket. For $17.00 a bottle the Irontite All Weather Seal is a great product. This formula can be dumped into your existing coolant mixture. The setup time will be about an hour and you’ll need to have the car running at operating temperature. This works on a variety of different makes or models.

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The formula works in engines with a cast-iron block as well. If you are thinking about sealing a bad head gasket on an older engine, this could be the solution. For the price and ease of use, Irontite All Weather Seal, Blue is a great choice.

Get it right here: Irontite All Weather Seal, Blue, 16 oz $19.74

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7. Prestone AS663 Head Gasket Stop Leak with Kevlar, 16.5 fl. Oz.

Prestone is a brand that’s closely associated with cooling systems and radiators. The AS663 head gasket formula is another pour and go formula that you can use to patch your engine. The difference here is the fact that it is from a trusted company. Generally speaking, if you have a new car there is a good chance that it uses a Prestone coolant. The Prestone AS663 Head Gasket Stop Leak with Kevlar, 16.5 fl. Oz.comes in an easy-to-use bottle that will give you a good deal sealant. Run the car until its operating temperature and commence to pouring.

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The Kevlar that is built into the liquid will ensure that you’ll have a good deal of protection. This works for head gasket leaks and other main seals. You can also use this as a way to quickly patch your radiator. This is a cost-effective and all-around trustworthy choice for a liquid sealant.

Buy it here: Prestone AS663-6PK Head Gasket Stop Leak with Kevlar, 16.5 fl. oz. (Pack of 6) Price not available

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6: BlueDevil 32oz Head Gasket Sealer w/Radiator Flush

Is your car a leaky mess? But you don’t want to get rid of it just yet? There is a solution from BlueDevil. The company is already known for providing stellar head gasket patch formulas, but this double pack goes a step further. You save a bit of money by being able to patch the radiator and head gasket at the same time. These leaks generally happen hand-in-hand and can be a problem that leads to another. The price for this combo pack will save you a great deal over what you’d spend at the auto parts store.

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The BlueDevil 32oz Head Gasket Sealer w/Radiator Flush comes with both of the award-winning fluids. If you are looking to keep your car on the road on a budget, this might be the best way to do it.

Get it here: BlueDevil 32oz Head Gasket Sealer w/Radiator Flush $64.95

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5. Lucas Oil 10278 Engine Oil, 1. Quarts

This product is not so much ahead of gasket sealer as it is a preventive tool. Generally, when your engine starts to leak oil it can lead to other problems. If your engine is leaking any fluids it will eventually overheat and lose compression. Using this Lucas Oil in your mixture will help to patch up any broken seals and even cure some of the early signs of head gasket damage. For the price, you get a comprehensive engine patch that will work with most engines on the market. Just pour it into your crankshaft and watch it work.

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Lucas products are some of the most trusted in the industry. If you want to prevent your car from leaking essential fluids this is the best way to do it. The Lucas Oil 10278 Engine Oil, 1. Quarts is a stellar deal that will keep your car on the road a lot longer.

Buy it here: Lucas Oil 10278 Engine Oil Stop Leak, 1 Quart $8.99

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4. Rislone 4447 Compression Repair with Ring Seal - 16.9 oz.

Rislone is another well-known chemical company specializing in automotive products. Generally, a sign of head gasket loss can be a loss of compression. When your vehicle loses power, it just creates an all-around negative effect. It might still be early in the problem and you might not have to spend money on an expensive head gasket repair fluid. A great way to troubleshoot is to use Rislone 4447 Compression Repair with Ring Seal – 16.9 oz. This product will work to seal any of the small leaks or cracks that might be forming in your engine.

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These include compression leaks inside of the engine, burnt seals, and even cracks in your cooling system. It is always best to start as cheap as possible and you can save money by using Rislone 4447 Compression Repair with Ring Seal – 16.9 oz. You might just save your car, too.

Buy it right here: Rislone 4447 Compression Repair with Ring Seal - 16.9 oz. $8.31

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3. Moroso 35500 Ceramic Engine Seal

Sometimes when it comes to engine repair, you need a fluid that will get the job done right the first time. You have to venture off the beaten path to find one. Moroso is a brand that you don’t see often in automotive parts retailers, but the company sells stellar products. The Moroso 35500 Ceramic Engine Seal is a relatively easy-to-use engine sealer that you can pour directly into the motor. You’ll get a quick seal and a long-term fix to an expensive problem. The one-pint bottle doesn’t seem like much, but pour it into the engine and watch your leaks go away.

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If you aren’t sure about patching a head gasket or you are still new to the whole process, the Moroso 35500 Ceramic Engine Seal can be an inexpensive way to get your vehicle back on the road in a pinch.

Get it right here: Moroso 35500 Ceramic Engine Seal - 1 Pint $19.47

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2. MCP Engine Seal

Some things are almost too good to be true, but in the case of MCP Engine Seal, the product does work. When you need to patch an engine in a hurry the process for using this stuff is a breeze. Just start the engine, let it run for 20 minutes, and the job is done. Sounds too good to be true right? Well, the MCP company offers a money-back guarantee that will get you back on the road in a pinch. MCP has been making gaskets for a long time and their automotive products are easy to use.

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For the price, the MCP Engine Seal is one of the easiest-to-use products. You don’t have to drain the radiator or do any type of flushing. For a quick and easy solution, this is a great way to get your car back onto the road.

Buy it here: ATP AT-205 Re-Seal Stops Leaks, 8 Ounce Bottle $11.99

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1. Bar's Leaks Liquid Aluminum Stop Leak - 16.9 oz

Another inexpensive way to repair a faulty head gasket that is not too damaged is with Bar’s Leaks Liquid Aluminum Stop Leak – 16.9 oz. This particular formula is only a few bucks and it has a range of different uses. It can patch the radiator and any hoses which is something that can cause head gasket leaks. This fluid also lowers the water temperature in your radiator which can help the engine run cooler. Bar’s Leaks products are easy to use, and as with most of the products, this one works.

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While this product is not suitable for advanced head gasket leaks, if the problem is just starting this could alleviate it. Check out Bar’s Leaks Liquid Aluminum Stop Leak – 16.9 oz for an inexpensive fix.

Get it right here: Bar's Leaks 1186 Liquid Aluminum Stop Leak - 16.9 oz $6.79

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