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Permatex 82180 Ultra Black Review: Maximum Oil Resistance RTV Gasket Maker
Oil leaks around an oil pan, timing cover, or transmission pan can turn a small repair into a messy repeat job. You need a gasket maker that stays flexible, handles powertrain fluids, and seals uneven surfaces without forcing you to cut a paper, rubber, or cork gasket.
This Permatex 82180 Ultra Black review explains what this 3 oz RTV silicone gasket maker does well, where it has limits, and whether it deserves a place in your automotive repair kit. You will see the key specs, best uses, application notes, pros, cons, and real buyer-focused tradeoffs before you decide.
Our Verdict
Rating: 8.5/10
Best For: DIY mechanics and professional technicians who need an oil-resistant RTV gasket maker for oil pans, timing covers, transmission pans, and differential covers.
Bottom Line: Permatex 82180 Ultra Black gives you a sensor-safe, non-corrosive, low-odor formula with strong oil resistance and flexibility. You still need clean surfaces, proper bead size, and full cure time, and you should not use it on head gaskets or parts that contact gasoline.
| Specification | Detail |
|---|---|
| Brand | Permatex |
| Model | 82180 Ultra Black |
| Product Type | Maximum oil resistance RTV silicone gasket maker |
| Tube Size | 3 oz |
| Item Model Number | 82180 |
| ASIN | B0002UEN1U |
| Product Dimensions | 1.38 x 3.81 x 8 inches |
| Item Weight | 1.6 ounces |
| Temperature Range | -65°F to 500°F intermittent |
| Formula | Sensor-safe, low-odor, non-corrosive RTV silicone |
| Fluid Resistance | Engine oil, transmission fluid, gear lube, coolants, shop fluids |
| Suggested Applications | Oil pans, timing covers, transmission pans, differential covers |
| Cure Time | Dries in about 1 hour and fully cures in about 24 hours |
| Not Recommended For | Head gaskets or parts in contact with gasoline |
| Special Notes | OEM specified and approved for dealership warranty requirements |
What Is Permatex 82180 Ultra Black?
Permatex 82180 Ultra Black is a 3 oz RTV silicone gasket maker for automotive sealing jobs that need high flexibility and oil resistance. It sits in the black gasket maker category and targets engine and drivetrain areas that face oil, heat, vibration, and shop fluids.
The main strength comes from its patented adhesion system, which helps the silicone retain flexibility and oil resistance after application. That matters when you seal an oil pan, timing cover, transmission pan, or differential cover, because those parts face heat cycles and movement.
You can use it as a formed-in-place gasket when a pre-cut paper, rubber, or cork gasket does not fit the repair. You still need to follow the label, clean the surface well, and allow the silicone to fully cure before you return the vehicle to heavy use.
Key Takeaways
- Permatex 82180 Ultra Black works best for automotive gasket applications that need maximum oil resistance and long-term flexibility.
- The sensor-safe, non-corrosive, low-odor formula suits oil pans, timing covers, transmission pans, and differential covers.
- The product handles intermittent temperatures from -65°F to 500°F and resists engine oil, transmission fluid, gear lube, coolants, shop fluids, and vibration.
- You get a 3 oz tube with a universal fit type, item model number 82180, and product dimensions of 1.38 x 3.81 x 8 inches.
- The formula dries in about 1 hour and fully cures in about 24 hours, but cold or very dry conditions can require more time.
- You should not use it on head gaskets or parts that contact gasoline.
Why Choose Permatex 82180 Ultra Black for Your Gasket Needs?
Permatex 82180 Ultra Black makes sense when your repair area faces oil, heat, and vibration. The formula resists powertrain fluids, including engine oil, transmission fluid, gear lube, and coolants, so it fits common under-hood and drivetrain sealing jobs.
The -65°F to 500°F intermittent temperature range gives you enough heat tolerance for many engine-adjacent repairs. You should still avoid head gasket work, because Permatex does not recommend this product for that application.
Flexibility also helps this gasket maker stand out. A rigid seal can crack or pull away when parts expand, contract, or vibrate, but Ultra Black keeps a flexible bond when you apply it correctly.
Permatex 82180 Ultra Black gives you a flexible, oil-resistant RTV seal for common automotive parts like oil pans, timing covers, transmission pans, and differential covers.
The 3 oz tube size also suits small to medium repair jobs. You can handle several targeted sealing tasks without buying a large cartridge or specialized dispensing gun.
Products Worth Considering
Professional Formula - This Clear Silicone Adhesive Sealant is a Sensor-Safe, General Purpose Clear RTV Sealant that can be used inside or outside for all your jobs
Designed specially for high-torque and high vibration applications
Who It’s For
- You work on oil pans, timing covers, transmission pans, or differential covers that need a flexible formed-in-place gasket.
- You want a sensor-safe, non-corrosive RTV silicone for engine and drivetrain sealing jobs.
- You need a gasket maker that resists engine oil, transmission fluid, gear lube, coolants, shop fluids, and vibration.
Who Should Skip It
- You need a product for head gaskets, because Permatex does not recommend Ultra Black for that use.
- You need a sealant for parts that contact gasoline, because this product does not suit gasoline-contact applications.
- You need the fastest return-to-service option, because this formula still needs about 24 hours for full cure.
Key Features That Make Permatex 82180 Special
Products Worth Considering
Sensor-safe, non-corrosive formula designed for superior adhesion to oily surfaces and long term durability
【GOOD SEALING,WATERPROOF AND OIL RESISITANT】Visbella High Temp RTV Silicone is a waterproof and oil resistant sealant. It is soaked for a long time without fracture, deformation, and resistance to aging and corrosion
Maximum Oil Resistance and High Flexibility
Permatex designed Ultra Black for areas that need flexible and oil-resistant silicone gaskets. That focus makes it a strong match for oil pans, timing covers, transmission pans, and differential covers.
The product retains flexibility instead of turning hard and brittle after normal heat cycling. That flexibility helps the seal handle vibration and slight movement between mating surfaces.
Its oil resistance also gives it an advantage over general-purpose silicone sealants. You should choose this type of gasket maker when engine oil or drivetrain fluids create the main sealing challenge.
Sensor-Safe and Non-Corrosive Formula
Permatex 82180 uses a sensor-safe, non-corrosive formula. That matters when you work near modern engine systems, where harsh vapors or corrosive chemistry can create unwanted problems.
The low-odor formula also makes application less harsh than older acetic-cure silicone products. You should still work in a ventilated area, wear gloves, and avoid skin or eye contact during use.
The formula meets performance specifications of OE silicone gaskets and carries OEM-specified positioning. For many buyers, that adds confidence when replacing a cut gasket with a formed-in-place seal.
Temperature and Fluid Resistance
The listed intermittent temperature range runs from -65°F to 500°F. That range covers many engine and drivetrain sealing situations, especially where parts face hot oil and repeated heat cycles.
Ultra Black also resists common auto and shop fluids. The verified fluid list includes engine oil, transmission fluid, gear lube, coolants, and general shop fluids.
You should not treat this as a universal chemical sealant. The product label excludes head gaskets and parts in contact with gasoline, so you need a different product for those jobs.
Cut-Gasket Replacement
Permatex 82180 can eliminate the need for pre-formed, pre-cut, paper, rubber, or cork gaskets in suitable applications. That benefit helps when you cannot easily source a replacement gasket or the sealing surface has minor irregularities.
The product works as a formed-in-place gasket, so the bead shape and surface prep matter. A continuous bead around bolt holes and sealing paths helps prevent gaps that can cause leaks later.
This flexibility does not mean you should use too much product. Excess RTV can squeeze into internal passages, so follow the label and use a controlled bead for the part you are sealing.
How to Use Permatex 82180 Effectively
Start by removing old gasket material, oil, dirt, and loose residue from both mating surfaces. Clean surfaces help the sensor-safe silicone bond properly and reduce the chance of a leak after cure.
Apply Permatex 82180 Ultra Black in a continuous, even bead. A bead near 1/8 inch works for many gasket maker applications, but you should always follow the part design and the instructions on the tube.
Route the bead around bolt holes when the part requires it. That step helps prevent fluid from finding a path through a fastener area after you tighten the cover or pan.
Assemble the parts within the working time stated on the product directions. Let the silicone dry for about 1 hour and allow about 24 hours for full cure before you expose the seal to demanding service.
Cold or very dry conditions can slow the cure process. Give the gasket maker more time when your garage temperature drops or the air feels very dry.
Products Worth Considering
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Top Uses for Permatex 82180: Practical Applications
The best uses for Permatex 82180 Ultra Black match its oil resistance, flexibility, and 500°F intermittent temperature rating. You get the most value when the repair involves engine or drivetrain parts that see oil and vibration.
- Oil Pans: The formula resists engine oil and helps seal stamped or cast pan flanges when the surface prep is correct.
- Timing Covers: The flexible RTV bead helps handle engine heat cycles and vibration around front cover sealing areas.
- Transmission Pans: The product resists transmission fluid and suits pan sealing jobs where the manufacturer allows RTV.
- Differential Covers: The oil-resistant formula works well for gear lube exposure when you clean the cover and housing flange first.
These applications show why Ultra Black fits both DIY garage work and professional maintenance. You should still check your vehicle service information before replacing a factory gasket with RTV.
How It Performs in Real Use
On an Oil Pan Repair
On an oil pan, Permatex 82180 gives you an oil-resistant seal that can adapt to small flange imperfections. The 3 oz tube size works well for a single pan job and leaves enough control for a steady bead.
On a Transmission Pan
For a transmission pan, the formula’s resistance to transmission fluid matters more than general adhesive strength. You get the best result when you tighten fasteners evenly and avoid squeezing excess RTV into the pan area.
On a Differential Cover
On a differential cover, Ultra Black handles gear lube exposure and vibration better than many general sealants. The flexible bead helps maintain the seal after the axle housing heats up during driving.
For Small Garage Repairs
The 1.6-ounce item weight and 3 oz tube format make the product easy to store in a toolbox or cabinet. Reseal the cap after use, because cured silicone in the nozzle can make the next repair harder.
Customer Experiences With Permatex 82180
Permatex 82180 Ultra Black is a top-rated choice on Amazon, and buyer feedback often focuses on oil resistance, adhesion, and versatility. Many users choose it for valve covers, oil pans, and other gasket-making jobs where regular sealants may fail.
Positive feedback commonly mentions the way the RTV adheres to metal surfaces after proper cleaning. Buyers also like that the formula stays flexible, because a flexible seal can better handle vibration and heat cycling.
Common complaints usually relate to prep and cure time rather than the formula itself. If you apply the product over oil residue, use too much bead, or expose it to fluid before full cure, the seal can fail.
You should also treat the safety warnings seriously. Use gloves, keep the work area ventilated, and follow the label because the safety sheet lists skin sensitization and cancer warnings for the product.
Pros and Cons
Pros
- Strong oil resistance for engine oil, transmission fluid, gear lube, and coolants.
- Flexible RTV formula helps handle vibration and heat cycling.
- Sensor-safe, low-odor, and non-corrosive formula suits many modern automotive repairs.
- Works as a formed-in-place gasket and can replace paper, rubber, or cork gaskets in suitable applications.
- Temperature range of -65°F to 500°F intermittent covers many engine and drivetrain sealing jobs.
Cons
- Full cure takes about 24 hours, so it does not suit every fast-turnaround repair.
- Permatex does not recommend it for head gaskets or parts in contact with gasoline.
- Surface prep matters a lot, because oil residue or old gasket material can weaken the seal.
Is It Worth the Price?
Permatex 82180 Ultra Black offers strong value for the price when your repair needs oil resistance, flexibility, and a trusted automotive gasket maker formula. You are not paying for a large specialty kit or cartridge system, which makes the 3 oz tube practical for many garage jobs.
The value improves when you use it on the right parts. Oil pans, transmission pans, timing covers, and differential covers match the product’s fluid resistance and flexible sealing design.
You should skip it when speed matters more than oil resistance. Products like Permatex The Right Stuff 90 Minute Black may make more sense when your main goal is a faster return to service.
How It Compares to Alternatives
Permatex Ultra Grey focuses more on high-torque and vibration-resistant applications, so it can make sense for rigid flanges like some intake manifold end seals, thermostat housings, and water pump areas. Permatex Ultra Red targets high-temperature and thermal cycling applications, such as some exhaust-related areas.
Permatex The Right Stuff 90 Minute Black gives you a faster cure option when you need quicker service. Permatex 82180 Ultra Black remains the better fit when your main priority is a flexible, oil-resistant seal for oil pans, timing covers, transmission pans, and differential covers.
Frequently Asked Questions
Is Permatex 82180 safe for use on plastic components?
Permatex positions 82180 Ultra Black as an automotive RTV gasket maker for gasket surfaces, not as a universal plastic adhesive. You should check the material, the part location, and the product label before using it on plastic components.
How long does Permatex 82180 take to cure?
Permatex 82180 dries in about 1 hour and fully cures in about 24 hours. Cold or very dry conditions can slow the cure, so give the seal more time when your garage conditions are not ideal.
Can I use Permatex 82180 in high-pressure applications?
You should use Permatex 82180 only in applications that match the label and your vehicle service information. It works well for suitable gasket-making jobs, but it does not turn every high-pressure joint into a safe RTV application.
Is Permatex 82180 resistant to gasoline and diesel fuel?
Permatex does not recommend Ultra Black for parts in contact with gasoline. For fuel-contact applications, choose a product specifically rated for that fuel and follow the manufacturer’s service instructions.
What is the shelf life of Permatex 82180 after opening?
The original article stated a 12-month shelf life after opening, but you should rely on the tube label for the most accurate storage guidance. Replace the cap after use and store the product in a cool, dry place to help protect the remaining silicone.
Does Permatex 82180 replace a pre-cut gasket?
Permatex says Ultra Black can eliminate the need for pre-formed, pre-cut, paper, rubber, or cork gaskets in suitable applications. You should still confirm that your specific part allows RTV gasket maker before you skip a factory-style gasket.
What size bead should you use with Permatex 82180?
A bead around 1/8 inch works for many RTV gasket maker applications, and the original article used that guidance. Your part design and product label should guide the final bead size because too much RTV can squeeze into internal areas.
The Bottom Line
Permatex 82180 Ultra Black earns an 8.5/10 rating because it gives you a strong mix of oil resistance, flexibility, sensor-safe chemistry, and practical 3 oz tube sizing. You should buy it for suitable oil pan, timing cover, transmission pan, or differential cover work, especially when you need a formed-in-place gasket.
You should look elsewhere for head gaskets, gasoline-contact parts, or repairs that need a very fast return to service. For the right automotive sealing job, Ultra Black remains a smart buy for everyday use and a dependable option for a garage repair kit.
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