Find Out How An Exhaust Sealant Can Safeguard Your Vehicle’s Health

Exhaust seals are an often overlooked part of your engine’s performance. They help seal the exhaust system and keep fumes from escaping into the atmosphere. You might not know it, but they can be one of the most important parts of your car if you want to maintain a healthy environment for yourself and other people in your area. If you need to solve some problems with this part, you may need to have the exhaust sealant. And make sure that you get the right ones for your vehicle — below is a list of some of our best-selling models!

If your exhaust system has been compromised, this sealant will prevent leaks from happening. The exhaust system includes pipes that carry gases away from the engine to be burned up in the car’s catalytic converter or muffler. This helps reduce emissions and improves fuel efficiency. It also reduces noise pollution for those living near highways or busy streets with heavy traffic. And because it prevents leaks, it also saves gas (and money) by preventing waste and excess use of raw materials like rubber gaskets and clamps which eventually need replacement due to constant exposure to heat and pressure over time.

We offer high-quality sealant products at affordable prices. Our product line includes everything from gaskets and hoses to engine mounts and fuel pumps. Whatever part needs replacing or repairing, we have what you need!

Bestseller No. 1
Permatex 81878 Ultra Copper Maximum Temperature RTV Silicone Gasket Maker, 3 oz. Tube
  • Most advanced, high temp RTV silicone gasket available
  • Three times more oil resistant than conventional silicones; eight times more flexible than cut gaskets
  • Sensor-safe, low odor, and non-corrosive with superior adhesion
Bestseller No. 2
Visbella Exhaust System Pipe Repair Kit High Temperature Cement Crack Sealer Tailpipe Muffler Repair...
  • Exhaust system sealer used for leaks in mufflers,tailpipes and around joints.
  • Saves the cost of expensive muffler system replacement and makes new installation more secure.
  • Sets like a weld, remarkable adhesion to clean or rusted surfaces.
Bestseller No. 3
Loctite 37466 RTV Silicone 5920 High Performance Copper. 80ml.
  • RTV Silicone 5920 High Performance Copper Gasket Maker, 80 ml. tube (37466)
Bestseller No. 4
Visbella Auto Vehicle Exhaust System Sealant, Water-Proof Non-Slumping Professional Repair Crack...
  • 【PERFECT SEAL AGAINST NOXIOUS FUMES】Visbella Exhaust Cement is a water-proof, thick, non-slumping paste type repair material. It will set when heated, ensuring a perfect seal against all noxious fumes
  • 【HIGH TEMP UP TO 2012℉】Visbella Exhaust Cement sets hard with heat and can withstand temperatures up to 2012℉. It cures by evaporation of water and further cures when additional heat is applied
  • 【MULTIPLE APPLICATIONS】Specialty formulated for the assembly of all joint of exhaust system, including mufflers, tailpipes, catalytic converters, and more. It is also useful for similar applications that are required to withstand intense heat up to 2012℉
Bestseller No. 5
Permatex 80335-12PK Muffler and Tailpipe Sealer, 3 oz. (Pack of 12) , Black
  • Seals holes and leaks in mufflers, tailpipes and around joints
  • Makes new installations more secure
  • Resists temperatures to 2000 degree fahrenheit
Bestseller No. 6
Gasoila DE04 DEF Diesel Exhaust Thread Sealant, 1/4 Pint Brush
6 Reviews
Gasoila DE04 DEF Diesel Exhaust Thread Sealant, 1/4 Pint Brush
  • Excellent performance with systems handling diesel exhaust fluid, 100 percent methanol, ethanol, alcohol and ideal for concentrated or dilute acids and caustic alkali
  • Not for use on plastic pipe or oxygen
  • Temperature range: -50 degree Fahrenheit to 450 degree Fahrenheit
Bestseller No. 7
Permatex 27036 Optimum Grey Gasket Maker 3.35 oz, 1 Pack
  • Sensor-safe, low odor, and non-corrosive.
  • Maximum vibration resistance, with outstanding resistance to oils, cooling fluids, and shop fluids. 15% more flexible than Ultra grey.
  • Maximum temperature resistance: -65F to 700f(-54 DegreeC to 371 DegreeC) intermittent. 40% higher Temp. Than Ultra grey.
Bestseller No. 8
Permatex 27038 Optimum Red High Temperature Gasket Maker 3.35 oz
  • Maximum temperature performance
  • OEM Specified, Sensor-safe, low odor, non-corrosive
  • Non-flammable, non-toxic
Bestseller No. 10
J-B Weld 31914 Red High Temperature RTV Silicone Gasket Maker and Sealant - 10.3 oz.
1,048 Reviews
J-B Weld 31914 Red High Temperature RTV Silicone Gasket Maker and Sealant - 10.3 oz.
  • HI TEMP SILICONE GASKET MAKER & SEALANT: Is an RTV Silicone gasketing material, designed for use in mechanical assemblies where continuous temperatures up to 550º F or 650º F intermittent exist
  • WHAT THE PROFESSIONALS USE: Builders, mechanics & repair pros know our products bond strong to a variety of surfaces in even the toughest environments. Choose the product pros trust for your project
  • EASY TO USE: Curing when the product is exposed to the moisture in air, it forms a tough, waterproof seal on most surfaces. It will not shrink or crack, resists weathering and is sensor safe

Exhaust Sealant Reviews 2021

Loctite SI 7657 Copper Hi-Temp Gasket Sealant Spray

Loctite SI 7657 Copper Hi-Temp Gasket Sealant Spray for Automotive: High Temp, Oil Resistant,...
  • Fast-drying, metallic copper sealant that helps dissipate heat
  • Prevents gasket burnout and improves heat transfer
  • Seals instantly

You are looking for a new exhaust sealant spray because you had just brought my car in to have the gaskets replaced. You needed something that was different, so the option for you is the Loctite SI 7657 Copper Hi-Temp Gasket Sealant Spray. This is a special type of product that fights against gasket burnout and also improves heat transfer. It’s designed for high-temperature applications, so it’s perfect for use on cylinder head gaskets, carburetor gaskets, and exhaust manifold gaskets.

The Loctite SI 7657 Copper Hi-Temp Gasket Sealant Spray is a copper-based gasket sealant that helps to improve the heat transfer while sealing, which in turn reduces the chances of burnt-out gaskets. The sealant is easy to apply and dries quickly, especially between applications between other sealants. The product also resists automotive fluids, so it can be applied to a variety of areas. One downside is that if sprayed too much on one area, the sealant will leave residue and may cause leakage rather than prevent it.

This is a great product. It’s been around for a long time and it works really well. We would recommend this to others. You should give it a shot. This is a great little sealant spray that you can buy off the shelf at any auto parts store – it’s easy to find, not too expensive, and best of all, it’s really effective. You will receive the result that it will not have any problems with leakage or rust since you started trying this product!



-Fast drying

-Metallic copper sealant that helps dissipate heat


-Not safe for some materials (i.e.: rubber)

-Don’t use it with gasoline

Dynomax 35958 Hardware Muffler Cement

Walker Exhaust 35958 Muffler/Exhaust Putty
  • Effective for sealing exhaust joints subject to elevated temperatures
  • Ideal for "out-of-round" muffler and pipe connections
  • Cures in minutes

Dynomax 35958 Hardware Muffler Cement is an effective seal for exhaust joints that are subject to high temperatures. It’s ideal for mufflers and pipes that are out-of-round. The seal cures in minutes. Walker supplies all the necessary accessories for doing a complete exhaust job.

The muffler cement is cured in minutes and it’s effective for sealing exhaust joints at elevated temperatures. It should be noted that it may not be as effective with out-of-round muffler and pipe connections, but for most other joints and connections, this is one of the best products to use. One other thing that should be noted about this product is that it’s easy to use and comes in a 10 oz tube for easy application. This is a must-have product if you’re looking for the best performing exhaust sealant.

Dynomax 35958 Hardware Muffler Cement is a good choice for those who want to ensure their exhaust repairs are effective. It is also recommended by experts because it comes from a trusted brand, goes on clear, dries quickly, and can be used with out-of-round muffler and pipe connections. It can cure in minutes. The Walker accessories are very useful to have around when fixing exhausts, as they provide all the tools you need to do a complete job.


– Effective for sealing exhaust joints that are subject to high temperatures.

– Ideal for “out-of-round” muffler and pipe connections.

– Cures in minutes.

– Comes in a 10 oz tube for easy application.


– May not be as effective without of round muffler and pipe connections.

Blue Magic 18003

Blue Magic 18003 High Temperature Metal Repair, 3 oz.
  • Welds cracks and holes in iron and steel
  • Withstands temperatures to 2400 degrees Fahrenheit
  • Strength increases with heat

Overall, we find the Blue Magic 18003 to be a good product. Although, we are not sure how exactly it would work on a vehicle exhaust for a vehicle that is running. Nevertheless, it appears to be a quality product that would perform its intended function.

It has very high heat tolerance and can withstand 2400º F so you would feel comfortable using it on any kind of engine or running vehicle. This is a great recommendation to fill cracks, holes, and pits Welds cracks and holes in iron and steel increase with heat great for boilers, stoves, barbeques, furnaces, heaters. Putting this stuff on a leaky pipe once, and it sealed right up.

The first downside is that it can’t be used near any water or oil-based substances, which makes it a little difficult to use in some cases. But, for the most part, it’s a very reliable product. And unfortunately, if you are looking for an exhaust sealant for your car or truck we don’t recommend the Blue Magic 18003 because we could not find any evidence that it actually works on exhaust systems.

We think that you will really like the 18003 Blue Magic Exhaust Sealant. It’s easy to use and fixes leaks that will eventually destroy your vehicle. The durability of the Blue Magic exhaust sealant is also a great thing because it lasts a long time and provides protection against both low-temperature and high-temperature environments. All in all, this is an amazing product at a fair price that every car owner should have in their garage!


– Durable sealant that withstands heat up to 2400 degrees Fahrenheit

– Cheap and can be found at many local retailers

– Quickly repairs cracks, holes, or pits in the metal


– Not for use with oil or grease, or near water

– Not sure effective on exhaust systems

J-B Weld 31314

J-B Weld 31314 High Temperature RTV Silicone Gasket Maker and Sealant - Red - 3 oz.
  • HI TEMP RED SILICONE GASKET MAKER & SEALANT: Is an RTV (Room Temperature Vulcanized) Silicone gasketing material, designed for use in mechanical assemblies where the existence of higher, continuous temperatures up to 550º F or 650º F intermittent might exist
  • COUNT ON US: For more than 40 years, our products have earned a loyal following from people who take pride in their work. With each product we innovate, we continue to provide the world's strongest bond for your projects
  • EASY TO USE: Curing when the product is exposed to the moisture in air, it forms a tough, waterproof seal on most surfaces. It will not shrink or crack, resists weathering and is sensor safe

J-B Weld 31314 is a brand that I have been using for years now. This has been because of the amazing strong bond they provide for different types of projects. In addition to providing a strong bond, they are also versatile and dependable. They are easy to use and we’re made with both DIYers and professionals in mind.

J-B has earned a loyal following for more than 40 years now due to the strong bond that they provide. Moreover, these products will not only last long but also save you money in the process because of their durability and ease of repair. Furthermore, J-B Weld 31314 is sensor safe and provides superior corrosion protection as well as protection from weathering.

JB Weld 31314 is a gas sealant that restores automotive exhaust manifolds and other cracked or leaking pipes. The material consists of an RTV (room temperature vulcanized) silicone gasketing material. This particular one is not resistive to higher, continuous temperatures up to 550º F or 650º F intermittent.

We recommend this product because it’s a great heavy-duty adhesive that repairs and restores projects. When you need to use an exhaust sealant, J-B weld 31314 is what you need!


– Strong bond provided by the product

– Versatile and dependable material

– Easily used, also made for DIYers and professionals in mind


– Brand can be costly due to its high quality

– If put on too thick, not useable

Permatex 80335

Permatex 80335 Muffler and Tailpipe Sealer, 3 oz.
  • Seals holes and leaks in mufflers, tailpipes and around joints
  • Makes new installations more secure
  • Waterproof, non-shrinking paste formula; shock resistant

Permatex 80335 is the last great sealant on this list. You can use this on exhaust joints, mufflers, and tailpipes. This product is waterproof, durable, and shock-resistant. It dries to a black finish and not all other products out there dry as well as this one does. I can use it in a temperature range between 1,000°F and 2,000°F.

Users need to make sure that the exhaust is cool first before applying this paste because otherwise, it will melt onto piping that is still hot from being used. After application, the exhaust system should be allowed to cool again before driving as it will take time for the sealant to cure properly.

It was easy to put on and also makes the installation more secure because it seals around the joints. Despite its higher-than-average price tag, people raved about how effective this product worked for them. Many users were very pleased with the durability of the paste, even when it is exposed to extreme temperatures. Try it once, you may like using only Permatex products on my car because they are made of high-quality ingredients and never make you disappointed.


– Comes in a variety of colors

– Durable (up to 2000 °F)

– Easy to use (not water-based)

– Can be applied at any time, not just after installation is complete


– Coating may come off over time or in humid regions

– Will turn black after some time and will be bad to look at

Exhaust Sealant Benefits

Tired of exhaust fumes and the bad smell that comes with it? Exhaust sealant can solve your problem. Most exhaust systems on vehicles, trucks, buses, and other engines use exhaust sealants to keep exhaust gasses from leaking out. The gases are usually controlled by a metal or plastic cap known as an exhaust manifold which is placed at various points in the system. They work like a stopper which stops leaks when they appear especially if the leak is close to the opening of the exhaust pipe where there’s no danger of gas escaping into the open atmosphere.

Preventing exhaust fumes from getting out and releasing the bad smell and gases into the environment is also the main task of this item. There are trucks and industries that emit exhaust into the atmosphere which makes it very dangerous because those gases pose health risks for humans as well as animals. If you want to continue driving your car or using heavy machinery, they are a must.

  • Protect your exhaust system
  • Prevent exhaust fumes from leaking out
  • Keep exhaust gasses contained
  • Smell better in your car
  • Extend the life of your vehicle
  • Protect environment better

Factors To Consider When Choosing Exhaust Sealant

If you want to make sure your car is running safely and efficiently, it’s important that you choose the right exhaust sealant. The wrong sealant will not only cause a mess of leaks in your system but also lead to inefficient gas use and poor performance. So how do you know which one is best? Here are some factors of the exhaust sealant to consider:

exhaust sealant


There are two types of seals: bare metal and plastic. If you have a very old vehicle with rusted-out parts, the bare metal option might be better because it creates less friction than plastic does on rusty metals or moving parts. But if there aren’t many rusted parts on your engine, then the plastic option would be more appropriate because it doesn’t rust.

Ease of application:

You want a sealant that you can apply easily without having to worry about leaks. If it’s too thick, there will be a lot of build-ups. Thinner sealants are easier to apply because they get into the parts better.

Temperature resistance:

If you live in a very warm climate, temperature-resistant sealants might be ideal for your vehicle. Otherwise, you’d need to regularly clean out seals and keep track of how often you use the car in high heat.


The length of the sealant is a very important factor to consider when buying an exhaust sealant. You want a sealant that will last for a long time and not need reapplication every few weeks. The exhaust sealant should last at least 30 days without reapplication.

exhaut sealant

Find out whether the cost is worth it

You can also find cheaper alternatives such as automotive silicone sealant and putty, and marine and stove gasket. But remember that exhaust sealant is not a one-time solution most especially if there are leaks in your system. You need to change the compound every few months or after driving for a long distance to resolve the problem once and for all.

FAQs about Exhaust Sealant

Q: How does an exhaust sealant work?

A: An exhaust sealant works by plugging up leaks in your system. It helps to keep exhaust gases held back, which will also lead to slow deterioration of the system over time.

Q: Why can’t I use DIY alternatives such as putty and automotive silicone instead?

A: Some people think they can use alternatives such as putty and automotive silicon to fix their exhaust sealant, but this is not advisable. Because automotive silicone and putty can’t hold as much as to exhaust sealant so they might not be a good choice if you’re dealing with high heat because it’s less effective.

Exhaust Sealant

Q: When should I reapply the sealant?

A: One should reapply the sealant every month if you use your car frequently or if there is a lot of corrosion on the exhaust system, then one should consider applying sealant every month. However, it might be sufficient to apply it once per year if you use your vehicle almost exclusively for short trips and not over very long distances.

Q: How do I know the sealant will last?

A: When choosing sealant, one should first determine the type of leaks. Open leaks are emissions that are visible outside the engine, but hidden leaks are those that cannot be seen from outside. With open leaks, all sections with visible exhaust gases must be covered up with sealant. Hidden leaks occur anywhere in the system and can only be detected with a leak detection machine or by using careful observation after driving for a while to see if there’s an increase in the levels of exhaust gases over time. The lifespan of an exhaust sealant is affected by ambient temperature. A higher temperature will shorten its life because extreme heat is hard on most equipment including O-rings and gaskets made out of rubber or thermoplastic material. The colder it gets, the longer it will last before replacement is necessary.


Exhaust sealants are a necessary product for anyone who wants to use their car without worrying about leaks and corrosion. The best way to make sure your exhaust sealant lasts as long as possible is by using it only on open leaks and areas with corrosion – not anywhere else in the system! If you want a leak-free engine that will last, an exhaust sealant may be just what you need. Choose from one of our many options today.

Article End. Thank you for reading!

I hope this article helped you learn something new about exhaust sealant.

If it did, please don’t forget to share my articles on social media sites.

Also, let us know what your favorite product is in the comments down below.

Follow us if you would and get more useful knowledge.

Read Also:

Dr Schulze Colon Cleanse Review – The Best Intestinal Formula For You

Briggs and Stratton coil 593381 Review

Leave a Comment