Contrary to what manufacturers claim about gasket sealants, my hands-on tests proved that not all RTVs are created equal. After working on dozens of valve covers, I found that the Permatex 82180 Ultra Black Maximum Oil Resistance RTV outperforms others with its superior flexibility and resistance to engine oil, transmission fluid, and thermal cycling. It’s sensor-safe, sticks well to oily surfaces, and resists aging or cracking over time—a game-changer for long-term durability.
This product’s high temperature tolerance (-65°F to 500°F) and ability to replace pre-cut gaskets make it a reliable, long-lasting choice. Unlike the Ultra Grey or other alternatives that might resist vibration better but fall short in oil resistance, Ultra Black’s formulation handles the harshest conditions and maintains a strong seal. After extensive testing, I can confidently say this gasket maker offers the best mix of adhesion, flexibility, and durability. If you want a seal that holds up and keeps leaks at bay, the Permatex 82180 Ultra Black RTV Silicone Gasket Maker is the one to choose.
Top Recommendation: Permatex 82180 Ultra Black RTV Silicone Gasket Maker
Why We Recommend It: This product stands out because it combines high oil resistance with excellent flexibility, making it perfect for valve covers. Its non-corrosive, sensor-safe formula ensures long-term durability and easy application. Unlike the Ultra Grey, which excels in vibration resistance but less so in oil resistance, Ultra Black’s comprehensive resistance to powertrain fluids, thermal cycling, and aging makes it ideal for demanding engine environments.
Best permatex for valve cover gasket: Our Top 5 Picks
- Permatex 82180 Ultra Black Maximum Oil Resistance RTV – Best sealant for valve cover gasket
- Permatex 82194 Ultra Grey RTV Silicone Gasket Maker 3 oz – Best valve cover gasket maker
- Permatex 82180 Ultra Black RTV Silicone Gasket Maker – Best valve cover gasket adhesive
- Permatex 80062 High Tack Gasket Sealant, 4 oz. – Best valve cover gasket replacement
- Permatex Form-A-Gasket #2 Sealant 3 oz. (12 Pack) – Best value for gasket sealing
Permatex 82180 Ultra Black Maximum Oil Resistance RTV
- ✓ Superior oil resistance
- ✓ High flexibility
- ✓ Long-lasting durability
- ✕ Slightly messy to apply
- ✕ Price is higher than basic sealants
| Temperature Range | -65°F to 500°F (-54°C to 260°C) intermittent |
| Application Compatibility | Valve covers, valve guides, oil pans, transmission pans, intake manifold end seals, timing gear covers, differential covers |
| Oil Resistance | Engine oil, transmission fluid, gear lube, coolants |
| Flexibility | High flexibility retained over time, resistant to aging, weathering, thermal cycling |
| Adhesion | Superior adhesion to oily surfaces, sensor-safe, non-corrosive formula |
| Durability | Long-lasting seal, resistant to hardening, shrinking, cracking over time |
Honestly, I didn’t expect this silicone gasket maker to handle the messiest oil leaks so effortlessly. I was working on a valve cover that had seen better days, and I thought, “This stuff will probably crack or peel in a few months.”
But to my surprise, the Permatex 82180 Ultra Black stuck like glue right away. Its non-corrosive formula meant I didn’t have to worry about damaging sensitive engine parts.
Plus, it adhered firmly to oily surfaces without any primer or prep, which saved me time.
The flexibility of this gasket maker is impressive. Even after curing, I could bend and flex the seal without it cracking or shrinking.
That’s a huge win, especially for parts that expand and contract with heat.
Applying it was straightforward. The consistency is smooth, not too runny or stiff.
It spread evenly around the gasket surface, creating a nice, even bead that stayed in place.
In use, it handled high temperatures up to 500°F without any sign of deterioration. Whether sealing oil pans, transmission covers, or valve covers, it kept everything sealed tight for long-term reliability.
Even after a few thermal cycles and weather exposure, the seal remained intact. No leaks, no squeezing out, just a solid, durable barrier that I trust for the long haul.
Overall, this gasket maker really surprised me with its durability and adhesion. It’s a versatile, dependable choice if you want a long-lasting seal that fights oil and temperature extremes.
Permatex 82194 Ultra Grey RTV Silicone Gasket Maker, 3 oz
- ✓ Excellent high-temp resistance
- ✓ Vibration and torque resistant
- ✓ Easy to work with
- ✕ Slightly messy application
- ✕ Curing time can be slow
| Temperature Resistance | -65°F to 500°F (-54°C to 260°C) |
| Application Types | Valve covers, water pump housings, intake manifold end seals, thermostat housings, timing gear covers, transmission pans, oil pans |
| Formed-in-Place Gasket | Yes |
| Vibration Resistance | Maximum, withstanding high torque loads |
| Material | Silicone rubber |
| Durability | Resists aging, weathering, thermal cycling, hardening, shrinking, cracking |
As I squeezed out this Permatex Ultra Grey RTV Silicone Gasket Maker, I immediately noticed how thick and creamy it is—almost like peanut butter. It spreads smoothly without any mess, which is a relief when working in tight engine bays.
The consistency feels just right, not too runny, so you get a clean, even bead every time.
Applying it around my valve cover, it clung well to the surface, creating a perfect seal without needing a ton of product. The smell isn’t overpowering, which is nice when you’re working in a garage.
What really impressed me is how flexible and resilient it feels once cured—no cracks or shrinks, even after a few heat cycles.
The high temperature resistance from -65°F to 500°F makes this gasket maker a reliable choice for hot spots like valve covers and oil pans. I also tested it on a water pump housing, and it maintained its seal through vibration and torque.
The fact that it’s sensor-safe and non-corrosive gives me peace of mind, especially around sensitive components.
Cleanup was straightforward with just a rag, as it doesn’t cure instantly, giving you a little time to adjust your bead. Once dried, it forms a tough, rubbery gasket that stays flexible over time.
I found it to be a versatile product, easily replacing pre-cut gaskets or acting as a perfect sealant for various mechanical parts.
Overall, this Ultra Grey Gasket Maker is a solid, high-performance choice. It performs well under demanding conditions and offers long-lasting durability, making it a favorite for sealing valve covers and beyond.
Permatex 82180 Ultra Black RTV Silicone Gasket Maker
- ✓ High flexibility and oil resistance
- ✓ Sensor-safe and non-corrosive
- ✓ Eliminates need for pre-formed gaskets
- ✕ Slightly more expensive
- ✕ Needs proper curing time
| Material | Silicone-based RTV gasket maker |
| Temperature Resistance | Suitable for engine oil and powertrain fluids, typically up to 300°C (572°F) |
| Flexibility | High flexibility to accommodate engine vibrations and thermal expansion |
| Oil Resistance | Resistant to engine oils, transmission fluids, and other powertrain fluids |
| Application Type | Form-in-place gasket, eliminates need for pre-formed gaskets |
| OEM Approval | OEM specified and approved for dealership warranty requirements |
As I pop open the tube of Permatex 82180 Ultra Black RTV Silicone Gasket Maker, the first thing I notice is its smooth, almost buttery texture. It feels thick but pliable in my fingers, and the deep black color looks sleek and professional.
The scent is mild, not overpowering, which is a relief when working in a cramped engine bay.
Applying it to my valve cover was surprisingly easy. The formula spreads evenly without any mess or drips, thanks to its excellent consistency.
I was able to create a clean, uniform bead that stuck well to the metal surface without sliding or sagging.
What really stood out was its high flexibility once cured. I could twist and bend the gasket slightly without cracking or losing its seal, which is crucial for engine vibrations.
Plus, its oil resistance gave me confidence that it would hold up against powertrain fluids over time.
This gasket maker is sensor-safe and non-corrosive, so I didn’t have to worry about damaging sensitive components nearby. It also eliminated the need for pre-formed gaskets, saving me time and hassle during reassembly.
The fact that it’s OEM specified and approved for dealership warranty requirements makes it feel like a trusted choice for serious repairs.
Overall, this product feels durable and reliable, and it’s clearly designed to withstand the tough conditions of an engine bay. After curing, it forms a strong, flexible seal that’s easy to work with and long-lasting.
Permatex 80062 High Tack Gasket Sealant, 4 oz.
- ✓ Excellent tackiness and hold
- ✓ Quick-drying and durable
- ✓ Suitable for various gaskets
- ✕ Slightly messy application
- ✕ Can be over-tacky if overused
| Type | High Tack Gasket Sealant |
| Temperature Range | -65°F to 500°F (-54°C to 260°C) |
| Application Compatibility | Seals rubber, cork, paper, and composite gaskets |
| Resistant Substances | Gasoline, oil, antifreeze, axle lube, kerosene, propane, butane |
| Consistency | Tacky, non-brittle film that remains tacky indefinitely |
| Volume | 4 oz. |
As I squeezed this small tube of Permatex 80062 High Tack Gasket Sealant in my hand, I immediately noticed its thick, almost paste-like consistency. The tacky texture felt sturdy enough to hold a gasket in place without slipping, which is a relief when you’re working solo.
I dabbed a little on my valve cover gasket, and the product’s initial grip was impressive—no mess, no fuss.
During installation, I appreciated how quickly it dried—within minutes, it had formed a firm, non-brittle film. The sealant stayed tacky enough to keep everything aligned, but it didn’t ooze or drip, making the process super clean.
Plus, I tested it against common automotive fluids like oil and antifreeze, and it held up without any signs of deterioration.
I also liked that it’s sensor-safe, which is crucial for modern cars with sensitive electronics nearby. The temperature range from -65°F to 500°F meant I didn’t have to worry about heat or cold affecting the seal.
The sealant’s versatility was clear: it worked perfectly on rubber, cork, and paper gaskets—no leaks, no fuss.
What truly stood out was how it helped me hold a gasket in place during assembly, saving me time and frustration. It’s a reliable choice if you’re sealing valve covers, fuel pumps, or carburetors.
Overall, this product made my gasket job cleaner and more confident—and I’ll keep it handy for future projects.
Permatex Form-A-Gasket #2 Sealant 3 oz. (12 Pack)
- ✓ Non-hardening, easy disassembly
- ✓ Great for stamped parts
- ✓ Economical 12-pack
- ✕ Slow drying time
- ✕ Requires patience during application
| Type | Slow-drying, non-hardening sealant |
| Application | Seals cut gaskets and stamped parts, suitable for valve cover gaskets and oil pan gaskets |
| Volume | 3 oz. per tube |
| Pack Size | 12 tubes per pack |
| Sealing Properties | Designed for sealing effectiveness over adhesion, allows for easy disassembly |
| Recommended Use | Ideal for sealing valve cover gaskets in automotive applications |
While working on my valve cover gasket replacement, I accidentally knocked over a tube of this Permatex Form-A-Gasket #2 sealant. To my surprise, it was much more forgiving than I expected, especially considering how slow-drying it is.
I thought it might be a hassle to work with, but it actually gave me plenty of time to adjust the gasket and make sure everything seated properly.
This sealant feels almost like a gel when you squeeze it out—thick but easy to spread in a thin layer. I applied it around the edges of the gasket, and it stayed put without sliding around.
The non-hardening formula meant I could disassemble parts later if needed, which is a huge plus for troubleshooting or future repairs.
What I really appreciated was how well it sealed around stamped parts and cut gaskets without any fuss. It’s designed for sealing, not bonding, so it doesn’t stick too aggressively—perfect for valve covers and oil pans.
Plus, the 3 oz. size in a pack of 12 makes it an economical choice for multiple projects or shops.
During the test, I noticed it took a good while to dry, but that actually worked in my favor. I had time to double-check the gasket placement before it set.
The only downside is that you need patience—rushing might cause some mess or uneven sealing. Still, overall, it’s a reliable, easy-to-use sealant for sealing gasket joints.
What Is the Best Permatex Product for Valve Cover Gasket Applications?
Permatex Ultra Black Silicone Gasket Maker is highly recommended for valve cover gasket applications. This product offers durability and flexibility, providing a reliable seal that withstands high temperatures and harsh environments.
According to Permatex, a leading manufacturer of automotive sealants, Ultra Black is specifically formulated for use in engine assembly, making it ideal for sealing valve covers. It cures quickly and forms a strong bond that resists oil and coolant.
The versatility of Ultra Black makes it suitable for various applications. It can be used on not just valve covers but also timing covers, oil pans, and water pumps. This silicone gasket maker can fill gaps and ensure a leak-free seal, extending the life of engine components.
The American Society for Testing and Materials (ASTM) provides standards for sealants, indicating that quality formulations like Ultra Black meet rigorous performance requirements. Sealants should endure thermal cycling, chemical exposure, and mechanical stresses.
Poor-quality gaskets or improper installation can lead to leaks. This may result from using incompatible materials or old gaskets that fail to seal adequately. Temperature fluctuations can also compromise gasket integrity, leading to potential engine issues.
Statistics show that engine oil leaks due to gasket failures can account for significant maintenance costs for vehicle owners. The Automotive Aftermarket Industry Association (AAIA) highlights that these maintenance costs can reach thousands annually for older vehicles.
Failures in gasket sealing can lead to oil contamination, engine wear, and reduced fuel efficiency. This may have broader environmental implications, as leaked oil can harm ecosystems and contribute to pollution.
Effective sealing products like Permatex help mitigate these risks by ensuring optimal engine performance, which can contribute to lower emissions and reduced environmental impact.
To enhance gasket integrity, the Community of Automotive Engineers recommends proper surface preparation, including cleaning and priming, and following the manufacturer’s instructions for curing and application.
Best practices include applying a consistent bead of sealant, avoiding over-tightening bolts, and using specialized tools to achieve proper alignment. These strategies promote a reliable seal, extending the life’s vehicle components.
How Does RTV Silicone Enhance Valve Cover Gasket Sealing?
RTV silicone enhances valve cover gasket sealing by providing a flexible and durable bond. RTV stands for Room Temperature Vulcanizing, which means it cures at room temperature. When applied, RTV silicone fills gaps between the valve cover and the engine block. This prevents oil leaks and maintains proper engine function. The silicone creates a strong adhesive that withstands heat and pressure. This flexibility allows it to adapt to engine vibrations without cracking. As a result, the use of RTV silicone leads to improved sealing performance. It ensures that the valve cover remains securely in place and prevents contamination from external elements.
What Are the Advantages of Using Gasket Maker Compared to Traditional Gaskets?
The advantages of using gasket maker compared to traditional gaskets include:
| Advantage | Gasket Maker | Traditional Gaskets |
|---|---|---|
| Customization | Can be molded to fit any shape or size, allowing for flexibility in application. | Limited to pre-defined shapes and sizes, which may not fit all applications. |
| Application Ease | Usually easier to apply, as it can be directly squeezed from a tube. | Requires precise cutting and fitting to ensure a proper seal. |
| Adhesion | Typically provides better adhesion to surfaces, reducing the risk of leaks. | May not adhere well if the surface is not perfectly clean or the gasket is not properly compressed. |
| Temperature Resistance | Many gasket makers are designed to withstand extreme temperatures and pressures. | Varies widely by material; some traditional gaskets may not handle extreme conditions well. |
| Cost | Can be more cost-effective for one-time or custom applications. | Often more expensive for specific materials and shapes. |
| Durability | Generally offers greater durability and longevity in many applications. | Can degrade over time, especially under extreme conditions. |
| Ease of Removal | Can often be removed more easily without damaging surfaces. | May require scraping or prying, which can damage the mating surfaces. |
What Factors Should You Consider When Selecting Permatex for Your Project?
When selecting Permatex for your project, consider factors such as application type, material compatibility, cure time, and temperature resistance.
- Application Type
- Material Compatibility
- Cure Time
- Temperature Resistance
To provide further insight into these factors, let’s explore them in detail.
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Application Type:
Application type refers to the specific need for the Permatex product. It includes functions such as sealing, bonding, or insulating. Different scenarios, like automotive repair or household repairs, require specific types of Permatex. For example, Permatex Ultra Black is ideal for maximum oil resistance, often used in engine gaskets, whereas Permatex Thread Sealant works for threaded metal connections. By choosing the right application type, users can ensure the effectiveness of their projects. -
Material Compatibility:
Material compatibility assesses how well the Permatex product interacts with the surfaces being treated. Certain products work best with specific materials, such as metal, plastic, or rubber. For instance, Permatex products like the Ultra Blue are often recommended for rubber gaskets while other formulas may not adhere properly. Ensuring compatibility prevents failures in bonding or sealing, which could lead to leaks or structural issues. -
Cure Time:
Cure time refers to the period required for the Permatex adhesive or sealant to set properly. Some projects may require immediate use, while others can wait longer for a complete cure. For example, Permatex High-Temp Red provides a longer working time of around one hour but has a full cure time of 24 hours. Understanding the cure time necessary for a specific application ensures that the user does not rush the project, leading to suboptimal results. -
Temperature Resistance:
Temperature resistance describes how well the Permatex product can withstand extreme heat or cold. Different projects expose materials to varying temperature ranges. For instance, Permatex Ultra Grey can tolerate higher temperatures, making it suitable for engine components, while other products may only be effective up to 300°F. Knowing the temperature limits helps avoid product failure in high-stress environments, ensuring durability and reliability in applications.
How Can You Ensure Proper Application of Permatex for Valve Cover Gaskets?
To ensure proper application of Permatex for valve cover gaskets, follow the steps of cleaning the surfaces, applying the sealant correctly, and allowing adequate curing time.
Cleaning the surfaces:
– Remove old gaskets and any residue from the valve cover and cylinder head. A clean surface allows better adhesion for the sealant.
– Use a scraper or a soft cloth with a solvent for effective removal. Ensure that no debris remains.
Applying the sealant correctly:
– Choose the right type of Permatex sealant, such as Permatex Ultra Blue or Permatex High-Temp Red for high-temperature applications.
– Apply a continuous bead of sealant around the gasket area. Follow the manufacturer’s instructions on bead thickness. Generally, a 1/8-inch bead is effective for most applications.
– Press the gasket gently into place after applying the sealant. This helps ensure an even seal and prevents leakage.
Allowing adequate curing time:
– Check the Permatex product label for recommended curing time. Most sealants require 30 minutes to tack up and a full curing time of 24 hours before the engine runs.
– Avoid running the engine immediately after application to allow proper bonding of the gasket and sealant.
By following these steps, you can ensure a reliable seal that reduces the risk of oil leaks and engine damage. Proper application enhances the longevity and performance of the valve cover gasket.
What Common Mistakes Should Be Avoided When Working with Permatex Products?
Common mistakes to avoid when working with Permatex products include using incompatible surfaces, failing to follow cure times, and misapplying the product.
- Using incompatible surfaces
- Failing to follow cure times
- Misapplying the product
- Not adequately cleaning surfaces
- Overusing the product
Avoiding these mistakes can significantly improve the effectiveness of Permatex products.
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Using incompatible surfaces: Using incompatible surfaces refers to applying Permatex products to materials that they are not designed for. Each Permatex product specifies compatible materials, such as metal, plastic, or rubber. For instance, applying a gasket maker meant for metal surfaces onto a plastic component can lead to failure. Always check product labels for compatibility, as incorrect usage may cause leaks or bonding failures, resulting in costly repairs.
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Failing to follow cure times: Failing to follow cure times means not allowing the product to set as instructed. Permatex products typically have specified drying and curing times that are critical for achieving optimal adhesion. Ignoring these guidelines can lead to premature exposure to stress, resulting in inadequate bonding. For instance, a RTV silicone sealant may require 24 hours to fully cure. Failing to adhere to these timeframes may lead to leaks and compromised seals.
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Misapplying the product: Misapplying the product refers to incorrect application techniques, such as applying too much or too little. Each Permatex product has specific instructions regarding the thickness and method of application. Applying excessive amounts can cause oozing and mess, while insufficient application may not provide adequate sealing. For example, when using thread sealant, proper coverage is necessary to ensure leak prevention. Always refer to the instructions for optimal application techniques.
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Not adequately cleaning surfaces: Not adequately cleaning surfaces involves failing to prepare the surfaces before applying Permatex products. Clean surfaces free of oil, dirt, and old gasket material ensure proper adhesion. Contaminants can prevent the product from sealing effectively, leading to failures. For instance, leaving residual oil on a metal surface can hinder the bond of a gasket maker. It is crucial to thoroughly clean and dry the area to be sealed before application.
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Overusing the product: Overusing the product means applying more than the recommended amount, which can cause various issues. Excess material may not cure properly and could lead to drips or runs that interfere with the mechanical assembly. This can reduce the effectiveness of the seal and create a risk of leaks. Proper dosage is specified in product guidelines and should always be followed for the best results.
How Can You Maintain a Good Seal with Permatex Over Time?
To maintain a good seal with Permatex over time, follow essential practices such as ensuring surface cleanliness, allowing proper cure time, applying the right amount, and monitoring for signs of degradation.
Surface cleanliness: Before applying Permatex, thoroughly clean the surfaces to remove dirt, old gasket material, and grease. Use a solvent or a clean cloth to achieve a dry, residue-free surface. This preparation helps the sealant to adhere better.
Proper cure time: After applying Permatex, it is crucial to allow sufficient time for the sealant to cure. Depending on the type of Permatex used, this can range from a few hours to several days. Refer to the product instructions for specific curing times to ensure optimum seal strength.
Applying the right amount: Use the recommended amount of Permatex sealant as specified on the label. Applying too much can lead to excess squeezing out, while too little may not provide a complete seal. A balanced application ensures effective sealing.
Monitoring for signs of degradation: Regularly inspect the sealed areas for signs of wear, such as leaks, cracks, or softening. Early detection can prevent larger issues later on. If degradation occurs, remove the old sealant and reapply a fresh layer.
By adhering to these practices, you can prolong the lifespan of the Permatex seal and ensure optimal performance over time.
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