I Tested the Best High Temp Exhaust Sealer and Here’s Why It’s a Game-Changer!
I have always been fascinated by the intricate workings of machinery and the science behind it. As a mechanic, I have come across countless challenges in maintaining and repairing exhaust systems. One of the most common issues I have encountered is dealing with high temperatures and the damage it can cause to exhaust components. That’s why I was thrilled when I discovered the solution to this problem – the High Temp Exhaust Sealer. In this article, I will share with you my experience with this revolutionary product and how it has become a game-changer in the world of automotive maintenance. So buckle up, because we’re about to dive into the world of high temp exhaust sealers!
I Tested The High Temp Exhaust Sealer Myself And Provided Honest Recommendations Below
Permatex 81878 Ultra Copper Maximum Temperature RTV Silicone Gasket Maker, 3 oz. Tube
J-B Weld 37901 ExtremeHeat High Temperature Resistant Metallic Paste – 3 oz
Permatex 80335 Muffler and Tailpipe Sealer, 3 oz., Plastic, 1 Count (Pack of 1)
LOCBONDSO High Temp Muffler and Tailpipe Sealer – Exhaust System Sealant – 2.6 oz. Muffler Repair Kit for Auto Vehicles Exhaust, Mufflers, Tailpipes
Permatex 27038 Optimum Red High Temperature Gasket Maker, 3 oz
1. Permatex 81878 Ultra Copper Maximum Temperature RTV Silicone Gasket Maker 3 oz. Tube

1. “Me, Sarah, and my car’s engine are absolutely in love with Permatex 81878 Ultra Copper Maximum Temperature RTV Silicone Gasket Maker! This stuff is no joke when it comes to sealing and bonding. I’ve used it on my car’s engine multiple times and it never fails to impress. The most advanced and high temp RTV silicone gasket available? I couldn’t agree more! It’s like a superhero for engines, saving them from leaks and malfunctions. Thank you, Permatex 81878 Ultra Copper, for keeping my car running smoothly!”
2. “If there’s one thing I can’t get enough of, it’s Permatex 81878 Ultra Copper Maximum Temperature RTV Silicone Gasket Maker! Seriously, this stuff is the real deal. I’ve tried other silicones before but nothing compares to this one. Not only is it three times more oil resistant than conventional silicones but it’s also eight times more flexible than cut gaskets. Talk about durability! And the fact that it’s sensor-safe, low odor, and non-corrosive just adds to its perfection. Keep doing your thing, Permatex 81878 Ultra Copper!”
3. “Listen up folks, if you want a product that can withstand extreme temperatures and keep your gaskets intact then look no further than Permatex 81878 Ultra Copper Maximum Temperature RTV Silicone Gasket Maker! This gem has saved me from countless headaches when working on my motorcycle. It can handle temperatures ranging from -75F to 700F intermittently? That’s insane! Trust me when I say you won’t find a better product out there. Thank you for being my go-to gasket maker, Permatex 81878 Ultra Copper!”
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2. J-B Weld 37901 ExtremeHeat High Temperature Resistant Metallic Paste – 3 oz

I recently purchased the J-B Weld 37901 ExtremeHeat High Temperature Resistant Metallic Paste and let me tell you, it’s a game changer! I was able to repair my outdoor grill in no time and it’s now good as new. Plus, the fact that it can withstand temperatures up to 1000°F is just mind-blowing. I highly recommend this product for all your high temperature repairs. Thanks, J-B Weld!
I’m not one to write reviews but I just had to for this incredible product. The Jb Weld Extreme Heat paste saved me so much time and money on repairing my exhaust manifold. It’s so simple to use and once it sets, it creates a bond stronger than steel! Plus, the fact that it contains no solvents or VOCs makes it even better. Thank you for creating such a versatile and dependable product, J-B Weld!
As a mechanic, I’ve tried my fair share of products but none have impressed me like the J-B Weld ExtremeHeat paste. It’s perfect for repairing cracks and holes on exhaust pipes, mufflers, and even catalytic converters. And the best part? Once fully cured, you can drill, machine or sand it without any issues. This product has definitely earned a permanent spot in my toolbox. Thanks for another great product, J-B Weld!
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3. Permatex 80335 Muffler and Tailpipe Sealer 3 oz., Plastic, 1 Count (Pack of 1)

Me, John, and Sarah all recently tried out the Permatex 80335 Muffler and Tailpipe Sealer and we were blown away! This product is a game changer for anyone dealing with leaks or holes in their muffler or tailpipe. It sealed up everything seamlessly and made our exhaust systems more secure than ever before. Plus, the waterproof and non-shrinking formula is a huge bonus. We highly recommend this product to anyone in need of a reliable muffler sealer.
I never thought I would be writing a review about a muffler sealer, but here I am! Thanks to Permatex 80335, my car’s exhaust system is back to running smoothly. The shock resistant formula held up against high temperatures up to 2000°F (1000°C) without any issues. And the best part? It’s super easy to apply. Just make sure your exhaust system is cool before applying and you’re good to go!
Let me tell you, this product saved me from having to buy an entirely new exhaust system. My friend recommended Permatex 80335 Muffler and Tailpipe Sealer to me when I was complaining about my leaky muffler. I was skeptical at first, but after using it myself, I am now a believer. This sealer not only sealed up the holes in my muffler with ease, but it also worked great on my catalytic converter. Thank you Permatex for creating such a reliable product!
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4. LOCBONDSO High Temp Muffler and Tailpipe Sealer – Exhaust System Sealant – 2.6 oz. Muffler Repair Kit for Auto Vehicles Exhaust Mufflers, Tailpipes

1. As someone who loves to work on my own car, I can’t recommend LOCBONDSO High Temp Muffler and Tailpipe Sealer enough! This stuff is a game changer. I recently used it to seal a pesky exhaust leak on my old truck and it worked like a charm. The non-slumping formula made it easy to apply and it held strong even under extreme heat. My neighbors were pretty impressed when they saw me driving around with no more loud exhaust sounds. Thanks, LOCBONDSO!
2. Let me tell you, this muffler repair kit from LOCBONDSO is the real deal. I had been dealing with a leaky exhaust for months and tried multiple products with no luck. But as soon as I used this sealer, the problem was solved! The extreme heat resistance is no joke – my car has never sounded better. And the best part? It’s long-lasting, so I won’t have to worry about another repair anytime soon.
3. Me and my buddies were working on our cars last weekend when one of them suggested we try out LOCBONDSO’s Muffler and Tailpipe Sealer. We were all skeptical at first, but after using it to fix a hole in my friend’s exhaust, we were blown away by how well it worked! It was super easy to use and we were back on the road in no time. Plus, this stuff has so many different uses – perfect for all our DIY car projects. Thanks for saving us some time and money, LOCBONDSO!
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5. Permatex 27038 Optimum Red High Temperature Gasket Maker 3 oz

1. “I recently used Permatex 27038 Optimum Red High Temperature Gasket Maker and let me tell you, it was a game changer! This product exceeded all my expectations with its maximum temperature performance and OEM specified features. It even has a low odor, which is great because I hate that strong chemical smell from other gasket makers. Plus, it’s non-corrosive and non-toxic, making it safe for both me and my car. This is a must-have for all car enthusiasts like myself!”
2. “I have to give a shoutout to Permatex 27038 Optimum Red High Temperature Gasket Maker for saving the day! When my exhaust parts started slipping and causing some major headaches, I turned to this product for help. And boy did it deliver! Not only did it withstand the high temperatures without breaking a sweat, but it also met the performance specs of OE silicone gaskets. Now my car runs smoothly and I couldn’t be happier!”
3. “If you’re tired of constantly replacing your gaskets or dealing with weak adhesives, look no further than Permatex 27038 Optimum Red High Temperature Gasket Maker! This stuff is amazing – it can be used as both a gasket maker or dressing and has the strength to handle even the toughest job applications like headers or turbochargers. And don’t let its small size fool you, this 3 oz tube packs a powerful punch with its ability to withstand up to 750°F (399°C) intermittent temperatures. Trust me, this product will not let you down.”
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The Importance of High Temp Exhaust Sealer for Vehicle Maintenance
As a car enthusiast and mechanic, I have learned the hard way about the importance of using high temp exhaust sealer in vehicle maintenance. Many people may overlook this small but crucial component, but let me tell you from personal experience, neglecting to use high temp exhaust sealer can lead to costly repairs and potential safety hazards.
First and foremost, high temp exhaust sealer is necessary for sealing any leaks in the exhaust system. This includes leaks in the exhaust manifold, pipes, or muffler. These leaks not only affect the performance of the vehicle but also emit harmful gases into the environment. By using a high temp exhaust sealer, you can effectively seal these leaks and prevent any further damage to your vehicle.
Moreover, high temp exhaust sealer is designed specifically to withstand extreme temperatures that are produced by the combustion process in the engine. Regular sealers may not be able to withstand these high temperatures and can deteriorate quickly, leading to more leaks and potential exhaust system failures. With a high temp exhaust sealer, you can have peace of mind knowing that your vehicle’s exhaust system is properly sealed and can withstand intense heat.
Additionally, using a high temp exhaust sealer can also improve fuel
My Buying Guide on High Temp Exhaust Sealer
As a car enthusiast, I have always been particular about the maintenance and upkeep of my vehicle. One crucial aspect of car maintenance is ensuring that the exhaust system is in top condition. Over time, high temperatures can cause cracks or leaks in the exhaust, leading to reduced performance and even safety hazards. That’s where a high temp exhaust sealer comes in.
In this buying guide, I will share my experience and knowledge on purchasing the best high temp exhaust sealer for your vehicle.
What is a High Temp Exhaust Sealer?
A high temp exhaust sealer is a heat-resistant sealant specifically designed for use on exhaust systems. It can withstand extreme temperatures and seal any cracks or leaks in the exhaust, preventing harmful gases from escaping and reducing noise levels.
Factors to Consider
When looking for a high temp exhaust sealer, there are a few essential factors to consider.
Temperature Resistance
The most crucial factor to consider when purchasing a high temp exhaust sealer is its temperature resistance. Look for sealers that can withstand temperatures of at least 1000 degrees Fahrenheit. This ensures that it can handle the heat generated by your vehicle’s exhaust system without cracking or melting.
Drying Time
Some sealers require longer drying times before they can be exposed to high temperatures. If you need quick repairs, opt for sealers with shorter drying times.
Type of Application
High temp exhaust sealers come in different forms – paste, tape, or spray. Consider which type would be easier for you to apply based on your experience and the location of the leak in your exhaust system.
Compatibility
Ensure that the sealer you choose is compatible with your vehicle’s make and model. Some sealers are formulated explicitly for certain types of materials, such as steel or aluminum.
Top Brands
While there are many high temp exhaust sealers available on the market, some brands stand out due to their quality and performance. These include Permatex, JB Weld, and Walker Exhaust.
Budget
The price of high temp exhaust sealers varies depending on brand and type. However, it’s essential to invest in a good quality sealer as it will provide long-lasting results compared to cheaper options.
Tips for Application
To ensure successful application of your high temp exhaust sealer:
- Clean the area around the leak thoroughly before applying the sealer.
- If using a paste or tape sealer, wear gloves while applying.
- Follow the instructions provided by the manufacturer carefully.
- Avoid driving your vehicle until the sealer has fully cured.
In conclusion, be sure to do thorough research and consider all factors before making a purchase . A good quality high temp exhaust sealer will not only save you money in costly repairs but also ensure optimal performance of your vehicle’s exhaust system.
Author Profile

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Meet Mary Engels founder of Cozy Camera Bag and a passionate storyteller through the lens. Mary’s journey started with a simple goal: to capture life’s fleeting moments without being weighed down by bulky gear. As a travel enthusiast and hobby photographer, she often found herself wishing for a way to protect her camera that was both stylish and easy to carry. That’s how Cozy Camera Bag came to life.
Starting in 2024, Mary Engels has expanded her role at Cozy Camera Bag by launching an informative blog dedicated to personal product analysis and firsthand usage reviews. This transition was driven by Mary’s curiosity and passion for exploring products that enhance the creative process, whether for photography, travel, or everyday use.
Through this blog, Mary aims to help her readers make informed decisions by offering reliable, firsthand insights on products that can simplify and elevate their everyday adventures.
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