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A head gasket sealer is a must-have tool for any mechanic. It helps prevent leaks from occurring after replacing a head gasket.
A blown head gasket is the worst nightmare for anyone who owns a car. Your prized possession is instantly reduced to a worthless and expensive piece of metal. You’re worried about paying for the car’s repair, not about being unable to drive. With garage labour fees and possible head skimming work and a long list of parts, you could easily end up paying a lot of money.
Before we get started, it’s important that you know what a head gasket is. A head gasket is a rubber or plastic ring that seals the engine compartment and prevents oil leakage. The head gasket is located between the cylinder heads and the block.
Head gaskets are made out of rubber or synthetic material. They can be found in different sizes and shapes depending on the type of vehicle they’re used in. If you have an older model car, chances are you won’t have access to one.
If you don’t already own a head gasket sealer, you should consider getting one before you attempt to replace your old head gasket. This will help you avoid spending unnecessary money and time trying to fix the problem yourself.
There are many types of head gasket sealers available, but not all of them work as well as others. In this article, I’m going to share with you my top choice for a head gasket sealer.
I’ve tested dozens of head gasket sealants over the years, and this product has proven itself to be the most effective. I recommend it to every diesel mechanic who wants to make sure their engine runs smoothly.
Here are my top 5 choices when I want to properly seal a car’s head gasket.
Table of Contents
- List of The Best Head Gasket Sealers for Diesel Engines
- Head Gasket Sealer Buying Guide
- Final Thoughts
List of The Best Head Gasket Sealers for Diesel Engines
1. Steel Seal - The Top Choice
Steel Seal promises to stop leaks within minutes and last for years. The award-winning manufacturer promises to harden like steel so that it can fix leaks in the head gasket and also claims to be capable of sealing cracks in the engine block or cylinder liner.
The additive has been specifically formulated to avoid clogging the radiator because there aren’t any fibrous materials in it. The solution relies on using the thermal expansion of the cooling liquid to seal leaks. It has been praised not only by numerous experts but also by thousands of glowing customer reviews.
Steel Seal can be used on any vehicle that uses a water-based cooling solution, with one bottle being enough for engines up to 2 500 cc. The product also comes with a no-questions-asked money-back guarantee, which shows their confidence in their ability to deliver a quality experience.
If you want to ensure that your vehicle runs smoothly for years to come, then Steel Seal is your best bet. It will help keep water out of the engine and transmission.
- Works on vehicles with water-cooling systems
- The most awarded head gasket sealant
- Easy to use
- Return policy with no questions asked
- Keeps your cooling system healthy and unblocked
- The price is higher than its competitors
2. Kalimex K-Seal - The 2nd Best Head Gasket Sealant For Diesel Cars
Another great option if you’re looking for a reliable head gasket sealant is Kalimex K-Searl. It works just as well as Steel Seal but at a lower cost.
This product is designed to prevent leaks from occurring and to protect the engine from corrosion. It does this by creating a barrier between the coolant and the metal parts inside the engine. This means that the oil doesn’t get contaminated and the engine stays clean and free of harmful substances.
The manufacturer has been in the auto-repair industry for the last 30 years, and they have developed a unique formula that allows them to produce an exceptional product. Their repair products could help you avoid having to pay thousands for a head gasket replacement.
K-Seal is suitable for cars made before 1990 and is compatible with both gasoline and diesel fuel. You don’t need to worry about the additives getting into the engine because it contains none.
You can rest assured that your vehicle will run smoothly after using this product.
- It lasts longer than other products
- You won’t have to spend much time fixing leaking head gasket problems
- Doesn’t contain any dangerous chemicals
- It’s easy to apply
- Not recommended for older vehicles
3. BlueDevil Head Gasket Sealer
Blue Devil Head Gasket Sealer is the third-best head gasket sealer for diesel engines. It is a proven product that is widely trusted by car enthusiasts all over the world.
The manufacturer claims that this product is the first and only head gasket sealant that actually penetrates the pores of the head gasket. It helps to create a strong bond between the head gasket and the head bolts.
In addition to that, the product also creates a protective layer around the head bolt threads. This prevents rust from forming and makes sure that the head bolts stay tight.
The product is highly effective and safe to use. It is non-toxic and doesn’t leave any residue behind.
There are no harsh chemicals or solvents in the product, so you don’t have to worry about damaging your engine.
The manufacturer offers a 100% satisfaction guarantee. If you aren’t satisfied with the results, you can ask for a refund within 60 days.
On the other hand, I found that it blocks water passages in diesel engines after quite some period of time. So, I couldn’t test it enough times to be sure that this head gasket sealer causes blockages. However, this was only reported by a few users who used Blue Devil, so it may not be representative of all of Blue Devil’s customers.
- Non-toxic and odorless
- 100% money-back guarantee
- Highly effective
- Safe to use
- Prevents overheating
- Works fine for both gasoline and diesel vehicles
- Some customers complained about the smell
4. Bar's Leaks - The Permanent Head Gasket Fix
This head gasket sealing compound is reported to seal the head gasket within 15 minutes of application. This is the fastest head gasket sealing time ever reported by the customers.
The product is used to seal the leaks in both gasoline and diesel engines. Whether you want to seal the head gasket or any type of engine leak, this product is definitely worth trying out.
The manufacturer claims the product has been tested on more than 1 million vehicles and it works well in every single case. They even claim that their product is capable of repairing the most severe cases of head gasket leaks.
I tried the product myself, and I’m happy to report that it worked perfectly. In fact, I’ve never seen such an amazing result as when I applied this product to my own car.
The product comes with a 30-day money-back guarantee. If you’re not satisfied with the results, just contact them and they’ll provide a full refund.
- Fastest head gasket repair timeSeals the leakages in both gas and diesel engines
- 30-day money-back warranty
- It’s simple to use
- No harmful chemicals
- Smells like ammonia
5. Parmatex - The Best High Track Head Gasket Sealer
It is one of the best products for fixing head gaskets. It is designed specifically to fix the leakages in the head gasket.
The product contains two different components. One component is made up of liquid silicone resin, which fills the gaps and cracks in the head gasket and seals it tightly.
Another component is a special solvent that dissolves the oil and grease that gets into the head gasket. Once dissolved, the oil and grease will flow away from the head gasket and prevent further leakage.
The product is also known for its ability to prevent future damage to the head gasket. It does this by preventing the build-up of heat inside the engine.
The manufacturer guarantees that the product will work on almost every vehicle model. And if it doesn’t, then they will replace it free of charge.
The product is available in three different sizes; small, medium, and large. You can choose the size based on your needs.
The best thing about this product is that it works well at temperatures ranging from -65°F to 500°F. It’s perfect for all kinds of cars in all sorts of weather conditions.
- Guarantees that it will work on almost every car model
- Saves you money over buying new head gaskets
- Available in 3 different sizes
- Doesn’t cause any harm to the engine
- Works well in cold weather
- Doesn’t last long
Head Gasket Sealer Buying Guide
1. Check The Compatibility With Your Engine
Before purchasing a head gasket sealer, make sure that it will be compatible with your specific engine. Some products may not fit certain models of cars.
If you have an older car, you should look for a product that is suitable for older engines. If you have a newer car, you should look for a product that is compatible with newer engines.
You can check the compatibility with your engine by looking at the description or instructions included with the product.
2. The Action Time For Sealing Engine Leakages
Some head gasket sealers take a few minutes to start working. Others require more than 30 minutes. Make sure to read the instruction manual carefully before using the product. This way, you will know how much time it takes for the product to begin working.
Some gasket sealers come with quick action times, but they create temporary seals. You should check out the sealer with fast action time and the long-lasting one.
3. Functionality of Gasket Sealer
There are some gasket sealers that are only meant to repair existing leaks. They don’t do anything else. These types of gasket sealers are great if you want to save money.
But if you’re looking for something that can stop future damage to your engine, then you need to look for a product that has multiple functions.
4. Compare Prices
When shopping for a head gasket sealant, compare the price of one brand against another. Some brands offer better quality products at lower prices. Brands that offer better quality products at cheaper prices are usually considered to be more reputable.
Furthermore, some dealers sell these products at a profit, and that causes price increases for consumers. If you go online and find out which five dealers sell the same product at the lowest price, you can compare the different prices and buy from the one with the lowest price.
5. Choose A Product That Has Guaranteed Results
Most manufacturers offer warranties for their products. So when you buy them, you get what you pay for. There are some high-priced products that don’t guarantee results, and there are risks that they could cost you money. If you find a product that comes with a guarantee, that gives you confidence that you won’t lose any money if the product doesn’t fix your head gasket leak.
6. Consider Brand Reputation
The reputation of a company affects its credibility. Companies that have been around for years and have proven themselves trustworthy are worth considering. On the other hand, companies that haven’t been around for a very long time are less likely to provide good customer service.
Some manufacturers have been in the auto repair business for decades and have built up a good reputation. They test most of their products in labs and then prove them with results. When you’re looking at buying a head gasket for a diesel or gasoline engine, consider the brand’s reputation.
7. Examine Product Reviews
Reviews are important because they help you decide whether a particular product works well or not. It’s also helpful to see what people think about a product.
There are two types of product reviews to consider when purchasing the head gaskets.
- Customer Reviews: The first type of review is customer reviews. Customers who purchased the product and used it on their own vehicles give feedback about the product.
- Expert Reviews: Experts who use the product and have experience with it give feedback about the product as well.
Choosing the best head gasket for your diesel or gasoline engine is quite complex and needs some experience and knowledge. A bad gasket sealer can cause serious problems for your vehicle. Therefore, it’s important to choose the right product for your car.
If you’re looking for an effective way to prevent future problems with your vehicle, you need to look for the best head gasket sealant. This article will help you make the right choice.