Best RTV for Valve Cover Gasket 2022 [Expert Review]

Best RTV For Valve Cover Gasket

Aging symptoms of cars and its parts naturally come up. You shouldn’t ignore if the symptom is a worn, brittle and cracked valve cover gasket. Repairing or replacing a malfunctioned valve gasket is one of the expensive car repairs. Based on your car make and model, you may need to spend $200 – $550 repairing a faulty valve cover gasket.

Thanks to the best RTV for valve cover gasket, a more affordable and alternative fix if you don’t have the money to replace your valve cover gasket. These products are a short-term solution for solving a coolant leak easily. However, we always recommend replacing your blown gasket as soon as possible!

This comprehensive guide will discuss the benefits and drawbacks of using a gasket sealant. Also, we will review some high-quality models and explain why you should consider it.

When Should You Use RTV for Valve Cover Gasket?

The complete form of RTV is “room temperature vulcanizing.” An RTV is a substance that fixes gaps and cracks in the valve cover gasket, preventing oil leaks from your cylinder head.

RTV silicone begins healing as soon as it comes in contact with air. It is water-repellent, sticky, and retains its shape. Mechanics of automotive repair shops highly require the service of RTV. This product is also usable for renovating bathrooms and kitchens.

Due to its quick curing time, shape and design, it is necessary to use RTV as a supplementary sealer for some welded rubber gaskets.

  • Apply RTV on the entire valve cover gasket for the best result. The gasket has to be cleaned and dried when installed.
  • Stepped casting areas have a gap where you can apply RTV as well. However, using the required amount is good enough to ensure a leak-free assembly.


What is the Best RTV for Valve Cover Gasket?

Best Overall: Permatex 82180 Ultra Black RTV Silicone Cover Maker

Best Flexible: Permatex Hi-Temp RTV Silicone Gasket Maker

Best for High-torque Applications: Permatex 82194 Rigid RTV Silicone Gasket Maker

Best for Durability: Permatex 85224 Right Staff Gasket Maker

Best for Professional-grade Result: Permatex 81160-12PK Red RTV Silicone Gasket

Best Ease of Application: Loctite 37467 Black RTV

Best Budget-friendly: Permatex 85913 Clear RTV Silicone Adhesive Sealant


Comparison Chart – Best RTV for Valve Cover Gasket

Product Name It’s Best for Setting Time Temperature Range Compatible Material
Permatex 82180 Ultra Black RTV Silicone Cover Maker Overall 2 hours -65°F to 500°F Metal
Permatex Hi-Temp RTV Silicone Gasket Maker Flexible 1 Hour -65°F to 500°F Metal
Permatex 82194 Rigid RTV Silicone Gasket Maker High-torque Applications 1 Hour -65°F to 500° Metal
Permatex 85224 Right Staff Gasket Maker Durability 2 Hours -75°F to 450°F Metal
Permatex 81160-12PK Red RTV Silicone Gasket Professional-grade Result 1 hour -65°F to 650°F Metal
Loctite 37467 Black RTV Ease of Application 24 Hours -65°F to 500° Metal
Permatex 85913 Clear RTV Silicone Adhesive Sealant Budget-friendly 1 Hour -75°F to 400°F Glass, Plastic, Metal, Fabric



7 Best RTV for Valve Cover Gasket Reviewed 2022

Seal your valve cover to avoid oil and other fluid leaks using RTV silicone. Here is a list of the top-rated RTVs available in the market.

1# Best Overall: Permatex 82180 Ultra Black RTV Silicone Cover Maker

The Permatex 82180 is safe for use around sensors and adheres perfectly to oily parts. It is efficient enough to resist many powertrain fluids such as engine oil, transmission fluid, gear lube and coolants. This sealer features a non-corrosive formula, helping it to retain high flexibility. Moreover, it offers excellent sealing ability from -65° F to 500° F.

Best RTV for Valve Cover Gasket

Features & Benefits

Dries Quickly: The performance of this sealer is excellent, even with a slight amount. It seals the blown head gasket quickly and doesn’t take much time to dry.

Sticks Well: This sealer’s strong bonding characteristics will also impress you for sure. As it resists oil and other liquids effectively, it performs perfectly for sealing and holding your valve cover gasket. More importantly, this is a long-lasting sealer, fixing blown gaskets to oily surfaces.

Versatile Automotive RTV: This versatile RTV allows you to sell nearly anything on your engine. Its highly flexible feature is usable with valve covers, intake manifold end seals, oil pans, differential covers, timing covers and other key locations. More importantly, it is non-toxic and non-reactive when cured, letting you seal material for aquatic applications.

Love It:

  • Waterproof and non-conductive RTV
  • Long-lasting durability
  • Applicable on a high vibration and high-torque applications
  • Versatile with additional features
  • Sensor-safe and easy to use

Leave It:

  • The excess product is hard to clean after applying
  • It has a thin consistency

Why Should You Buy It?

This rtv application product will be an ideal solution if you don’t prefer to put temporary sealants like rubber gaskets, cork, paper, etc. It is rigid, creating a common bond to oily surfaces. Moreover, Permatex resists chemicals and water proficiently.

2# Best Flexible: Permatex Hi-Temp RTV Silicone Gasket Maker

A preferred gasket maker by automotive technicians worldwide, the Permatex Hi-Temp RTV Silicone Gasket Maker adheres to any surface. After curing, it remains extremely flexible. This material cures immediately after exposure to air and creates a flexible, stiff silicone rubber gasket. You will get leak-free and damage-free performance from it for many days.

Best RTV for Valve Cover Gasket 2022 [Expert Review]

Features & Benefits

·   Heavy-duty Oil Application: There are a few exceptional benefits, such as this product never squeezes out. It is a fast-curing RTV and well-formulated product for high-temp applications and heavy-duty use. Additionally, the flexibility and durability of the product will put a smile on your face.

·    Ideal for Max Gap Coverage: Gap in the valve cover gasket can adversely reduce the efficiency and performance of your vehicle. This RTV sealant seals gaps and cracks of your valve cover gasket, assisting your vehicle engine to perform at its best.

·     Sensor Safe: Characteristically, sensor safe RTV features low odor and non-corrosive performance. You will not feel disturbed when applying it for its low odor feature. Also, this unit withstands oil and other fluids. Moreover, it is resistant to thermal cycles, crack, damage, etc., offering long-lasting service.

Love It:

  • Easy application process
  • Ideal for heavy-duty and high-temp applications
  • Resists thermal cycles, shrinking, vibration
  • Flexible and durable
  • Most advanced, sensor safe with significant adhesion

Leave It:

  • Must use it with new coolant

Why Should You Buy It?

It is one of the best alternatives for repairing your entire gasket parts. The application process is effortless, and it is easy to use. It doesn’t contain harmful chemicals to damage any parts of your engine. Curing time is also faster when exposed to air and moisture. More importantly, this material doesn’t crack or damage because of the high-temp resistance formula.

3# Best for High-torque Applications: Permatex 82194 Rigid RTV Silicone Gasket Maker

The Permatex 82194 Rigid RTV Silicone Gasket Maker is a popular item in the automobile maintenance and repair industry. This is an ideal one-minute solution for newer and imported vehicles. It comes in a handy size and performs proficiently under high-torque applications. This stuff sets up hard but doesn’t get brittle, making it an excellent choice to be used inside a motor.

Best RTV for Valve Cover Gasket 2022 [Expert Review]

Features & Benefits

·  Retains High Flexibility: This RTV silicone rubber maintains the right viscosity, improving resistance to vibration, high-temp and high torque. At the same time, these features help Permatex 82194 resist cracking, moisture, chemical, weather and extreme temperature between -65°F to 500°.

·   Multi-purpose: It is designed to be used for multi-purpose applications. You can use it on valve covers, timing covers, oil pans, water pumps, entire gasket, etc. Impressively, it delivers efficient performance regardless of the applications.

·   Quick Drying Time: After applying, leave It for a few hours and see the magic. Once dried, it creates a long-lasting effect and seals cracks and gaps quite effectively. Due to its efficient performance, the lifespan of your vehicle engine gets improved.

Love It:

  • A small amount is required to seal gaps
  • Performs well with different auto parts like water pumps, oil pans, etc.
  • Ideal for newer domestic and import cars
  • Withstands auto and shop fluids
  • Formulated with an advanced formula to deliver long-lasting performance

Leave It:

  • This will only bond to an oil-free surface

Why Should You Buy It?

This works best with different vehicles and delivers reliable service for several days. It can also work everywhere to fix any gaps or cracks. Shrink-proof and migration-resistant performance of the RTV lets you save money in the long run.

4# Best for Durability: Permatex 85224 Right Staff Gasket Maker

If you are looking for a highly effective sealant that promises to stop leaks for all rubbers and gaskets, the Permatex 85224 Right Staff Gasket Maker will be an ideal solution. Many riders and professionals prefer it over other gasket makers for its reliable and durable performance. It is simply outstanding and is your next best choice for buying a gasket maker.

Best RTV for Valve Cover Gasket 2022 [Expert Review]

Features & Benefits

·  Fast-acting Stuff: This stuff seals all gaps at a speed rate. It is formulated to deliver professional-level strength. It eliminates the need for paper, pre-formed, cork, or pre-cut gaskets. This formula also guarantees no over-swelling or breakdown of your seals.

·  Long-term Durability: Vibration and thermal expansion are common in every car. Happily, small amounts of it creates a long-lasting and durable seal by building an elastomeric rubber gasket. In fact, the produced seal is somewhat soft but solid and oil-resistant. According to some car owners, it works like a champ even 5000 miles later.

·  Resists High and Low-temp: “Formed-in-place” material is used to manufacture this product. You will find it easy to apply on various surfaces, including water pumps, valve covers, oil pans, gearbox covers, thermostat housing, etc. Also, it delivers good performance reliably on variable temperatures ranging from -75°F to 450°F.

Love It:

  • One-minute return to service
  • It creates long-term sealability
  • You can use it for various applications, including automotive, marine, etc.
  • Make leak-proof gaskets
  • Ability to seal scored surfaces

Leave It:

  • Extracting it from the tube is challenging

Why Should You Buy It?

The fast drying time of this RTV allows you to make quick repairs to engine parts. It is well-known for its high-resistance characteristics. This is well-performed with oil pan applications, timing covers, differentials, etc.

5# Best for Professional-grade Result: Permatex 81160-12PK Red RTV Silicone Gasket

The Permatex 81160-12PK Red RTV Silicone Gasket will be your best buy if you are looking for an affordable pick. For your vehicle engines. This professional-grade RTV seals the valve cover gasket and other leaks associated with the cooling system. It is formulated for high-torque applications and heavy-duty use.

Best RTV for Valve Cover Gasket 2022 [Expert Review]

Features and Benefits

    · Coats Pre-cut Gaskets: Increase reliability by coating the pre-cut gasket with this Permatex High Temp Red RTV Silicone. It can mix with any type of antifreeze components and replaces nearly any cut gaskets.

  ·Withstands High Temperature: Whether you need to use it for light-duty or heavy-duty use, it always offers the best result. It delivers impressive performance between the temperature range of -65°F to 650°F. Even the RTV doesn’t crack, shrink or move in the fluctuation of the high-temperature range.

 ·Excellent Sealing Performance: Torque retention performance will impress you for sure. It has sensor-safe and oil-resistant properties, making it a low-odor RTV silicone gasket. More importantly, it can be used on high oil resistant applications like oil pans, transmission pans, etc.

Love It:

  • The ratio of price and performance is brilliant
  • OEM specified RTV silicone gasket
  • Oil and other fluids (except gasoline) can affect its performance
  • A good solution for high-temperature applications
  • Excellent torque retention

Leave It:

  • The nozzle requires improvement

Why Should You Buy It?

It turns out to be a rigid material when dried. The stuff takes 24 hours to cure totally and is then introduced to oil or other fluids except for gasoline. It works best with heavy-duty applications such as trucks, trailers, buses, etc. This reliable gasket sealer works almost everywhere.

6# Best Ease of Application: Loctite 37467 Black RTV

The Loctite37467 Black RTV is great stuff, creating strong bonds at room temperature. Also, it resists high torque and temperature pretty effectively. This black RTV repairs and rebuilds materials exposed to high temperatures in industrial and automotive maintenance appliances.

Best RTV for Valve Cover Gasket 2022 [Expert Review]

Features & Benefits

· Extremely Practical and Flexible: The performance will never dissatisfy you. Whether oil is leaking from your vehicle radiator, tailpipes, exhaust manifold, ductwork, machinery and engine blocks, it effectively stops oil. Even, it holds metal and automotive materials efficiently.

· Quick Drying Time: You won’t have to wait for long hours after applying Loctite 37467. It dries within 1 hour at room temperature, while most RTV takes 5 – 6 hours. More importantly, it can be painted, drilled, hammered, and grounded after 8 hours.

·Easy to Apply: Applying the RTV is extremely simple. After applying, you will not have a messy surroundings, and you will not experience difficulty cleaning it. It creates a water-proof seal on different surfaces once exposed to the air’s moisture. The RTV is also resistant to shrink, crack and sensor-safe.

Love It:

  • Rapid curing time
  • Forms weather-resistant seals
  • You can use it on a variety of surfaces
  • Usable in electric cars for its sensor-safe nature
  • Easy to apply

Leave It:

  • Skin irritant

Why Should You Buy It?

It is one of the best RTV for valve cover gaskets, resisting high temperatures. It seals perfectly on metal and automotive materials and delivers no-crack performance at high temperatures. Besides, with a little effort, its application process is simple.

7# Best Budget-friendly: Permatex 85913 Clear RTV Silicone Adhesive Sealant

Permatex is well-known for manufacturing good quality RTV Silicone Adhesive Sealant, and this Permatex 85913 is also no exception. It works on a wide range of indoor and outdoor surfaces: metal, glass, plastics, vinyl tops, fabric, etc. A little bit goes a long way, and it holds up to heat and weather with no issues.

Best RTV for Valve Cover Gasket 2022 [Expert Review]

Features & Benefits

·         Ease of Application: While most RTV silicone is hard to apply, this will not give you a hard time in the repair shop. It is made to fix things when used in cracks or gaps. After 24 hours, you will find zero leaks. This means it effectively minimizes oil leaks from the vehicle engine, exhaust pipe, etc.

·         Ease of Removal: After applying, it is easy to remove using a tool or file made for this specific reason. Also, a nail filing board is good enough for the easy removal of this RTV. All in all, it is a handy product you can use for domestic purposes.

·         Incredibly Versatile: This clear silicone is highly recommended for various applications. It is much more efficient in stopping oil leaks from automotive parts. You can use it to seal headlights and seal bathroom fixtures. Even it stops the leak of water toys.

Love It:

  • Dries to a non-crack form
  • Remains tacky
  • Holds gasket in place during assembly
  • Reliable and quick-drying
  • Best choice for automotive applications

Leave It:

  • Strong odor

Why Should You Buy It?

This clear RTV silicone is of high quality, resists water. Also, its speed rate is faster. With high durability, it creates a solid seal to prevent oil from cylinder gear. Also, the affordable price makes it one of the best budget-friendly RTVs for a valve cover gasket.

What to Consider When Buying the Best RTV for Valve Cover Gasket – Buying Guide

Different types of RTV for valve cover gaskets are available in the market. All kinds of stuff don’t perform equally. So, if you don’t know the factor of a good quality RTV, you may have a poor quality product. But according to Bryan’s Garage Permatex hold the number 1 tag.

Before buying the best RTV for the valve cover gasket, you need to know a few important factors.


Compatibility is one of the crucial factors when buying the best RTV for the valve cover gasket. You need to know whether the selected RTV is compatible with your car’s engine.

For example, some RTV dissolves easily by gasoline. As a result, we recommend not to use them in the head gasket or other areas where they might come in contact with gasoline.

On the other hand, some stuff hardens after applying, and others remain flexible. You need to choose the one that suits your requirement.

Waiting Time

All RTV’s waiting times are not the same. Some require several hours to set, while others need very little time. Several hours of waiting time mean you have to wait more before taking your vehicle on the road.

Fast curing time is always beneficial because it saves valuable time. Choose something that takes a maximum of 1 hour to dry and cure.

Easy Application Process

This is another crucial factor because RTVs are available in different container types. Application methods are also different.

While every manufacturer formulates RTV with an easy application process, this factor is something that gives you the flexibility to work with the RTV for the valve cover gasket.


How long the effect of the sealant lasts is also significantly important. Definitely, you want something that performs as a permanent solution.

So, buy an RTV that gives you durable and long-lasting performance.


How to Apply RTV and Properly Make a Valve Cover Gasket?


Here we will describe the proper application process of RTV to make your valve cover gasket. You can take it a DIY project and you can also know about making stick from us.

Step 01: Attach Nozzle in the RTV Tube

Take the cap of the RTV and puncture the top of the RTV. Then grab a nozzle and Cut it according to the desired thickness. Next, screw the nozzle up in the tube. Now you need to make a continuous portion of RTV going around inside the cover.

Step 02: Start Applying RTV

Be careful when applying the RTV on the cover. The RTV can get into the valve and cause a problem if you use too much. In comparison, too little will not make a good seal. So, make sure to use the right amount of RTV. 1/4“thickness is good enough to create a good seal. Apply the RTV right into the middle of the surface. Take your time, don’t rush when applying.

Step 03: Leave the RTV for a Few Minutes

Once applied, leave it for a few minutes. Thus, the RTV will get a bit tacky, so the gasket can get compressed and make an excellent seal.

Step 04: Install the Cover Gasket

Now get a paper towel. Clean the mating surface to remove oil and grease. While installing the cover gasket, the key thing is to get the bolts in, which keeps the cover in place nicely. Push bolts through the required position and align the valve cover perfectly. Hand tighten the bolts first and then start putting the other bolts in. Then use a wrench to tighten the bolts at the right torque. If you see the RTV starts to come out from the side of the cover, be sure you have done your job.

Some Practical Considerations When Using RTV Silicone

You need to consider a few points when using RTV silicone on the valve cover gasket,

  • Make sure your RTV suits your application
  • Apply sufficient amount of RTV to get the job done
  • Don’t start your vehicle until the cure time is finished
  • Avoid using silicone on the galvanized surface
  • As soon as the RTV gets exposed to air, it starts curing. So, after applying, leave the surface in the air for recommended minutes


How Long Does an RTV for a valve cover gasket Work?

There is no straightforward answer about how long it will work. The longevity of an RTV depends on the number of leaks and the condition of the valve cover gasket. Moreover, the RTV type matters also.

Certain chemicals or materials can wear down the RTV, like exposure to gasoline. Also, if the blown gasket problem returns, the RTV stops working.

An RTV performs for many days if the gap, leak or damage to the valve cover gasket is minimal.

Do RTV for valve cover gaskets work?

Yes, they do. Once you use them in the valve cover gasket, you will experience that the problem like oil leaking disappears. RTVs are formulated to repair leaks, gaps, and cracks in the valve cover gasket, efficiently eliminating oil leaks.

Final Words & Top Picks

Don’t buy the first RTV that you see in the market. Gather information about the best RTV for the valve cover gasket before heading to the shop. You need to consider some factors, and this comprehensive guide shares all the necessary information to let you make a precise choice.

We recommend you buy the Permatex 82180 Ultra Black RTV Silicone Cover Maker. It offers excellent adhesion to oily and greasy surfaces and features non-corrosive, sensor-free formula. Also, it resists powertrain fluids like coolants, gear lube, oil, etc., quite efficiently. Overall, this RTV for valve cover gasket is ideal for domestic and older vehicles.

About Martin Lisa

Martin Lisa is the Founder of Aspiring Handyman, a training automobiles resource, and a Certified Automobile Expert based in NY, USA. She holds a bachelor’s and a master’s in Automotive Engineering.

Leave a Comment