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⏳ Seal it fast, seal it right—because downtime is so last decade!
Permatex 25228 The Right Stuff 90 Minute Black Gasket Maker is a professional-grade, fast-curing silicone sealant designed to replace precut gaskets with a durable, blowout-resistant black seal. Curing in just 90 minutes, it’s ideal for automotive applications including valve covers, intake manifolds, and oil pans, offering quick return-to-service and long-lasting performance trusted by mechanics and fleet operators alike.


| ASIN | B07R4C3KJB |
| Best Sellers Rank | #57 in Automotive ( See Top 100 in Automotive ) #1 in Gasket Sealers |
| Brand | Permatex |
| Brand Name | Permatex |
| Color | Black |
| Customer Reviews | 4.8 out of 5 stars 1,499 Reviews |
| Global Trade Identification Number | 00686226252289 |
| Included Components | Gasket Maker |
| Item Shape | As Shown |
| Item Thickness | 1 Inches |
| Item Type Name | Gasket Maker |
| Manufacturer | Permatex |
| Material | Plastic |
| Material Type | Plastic |
| Model | 25228 |
| Part Number | 25228 |
| Shape | As Shown |
| UPC | 686226252289 |
| Unit Count | 1.0 Count |
| Warranty Description | No_warranty |
R**N
Definitely the Right Stuff!
This is a great product. Quick to cure and gets your car back in use, great longevity and does leak. Not juts a clever name.
J**J
The GOAT of RTVs, worth the money...
Used to seal a plain old stamped steel lower oil pan to the aluminum upper oil pan. Followed directions, zero leaks, cures just as fast as directions state: finger tighten, then 60 minutes wait, then torque to spec, then 30 minutes wait, then pour oil in. About the only bad part (and it isn't their fault) is how annoying it is to squeeze it out with a continuous pressure because it's a tube, companies sell "tube dispensing pliers", I just don't do enough of these to justify buying one. Some may wonder just how well it adheres and how easy it is to remove after a fresh application. I had to remove the pan roughly four weeks after resealing with Right Stuff (reason for removal had nothing to do with Right Stuff), so I was able to test the adhesion as well. The old RTV that was on the pan for fourteen years was so weak and already seeping oil past it, that just inserting a putty knife by hand and twisting at one corner removed the entire pan. Right Stuff adhered so well that I had to insert the putty knife into three corners, by hammer, twist just to even start splitting, then do a lot of downward pulling. No damage (or bending) occurred to the pan and it does come off but the adhesion is extremely tight. With the pan bolts on I can see why this wouldn't leak oil and it's been months now with zero drops of oil. Getting the remnants off the lower and upper oil pan was mildly annoying since it was stuck on well, but nothing plastic razor blades couldn't fix. On the second time around re-sealing the pan, I used the same tube of Right Stuff, the pan is 14x9 inches so the tube had enough to do that pan about three times with a ~4mm bead, if you like to smear it rather than bead it, you can probably get more out of it if you smear it without waste. After four weeks the Right Stuff in the tube was just as pliable as when I first bought it, I've never had to re-seal back to back like this with a four week gap between, usually the gap between when I use a tube is months to years and it's dried up by that point, so just know it's going to last a while. Save the plastic nozzle when you're done with it, if you throw the nozzle away you're going to need to buy the nozzle four pack that Permatex sells if you need it again anyway. The nozzle may look like a lost cause because of the RTV in it, but just let it dry and cure, once it dries and cures, it becomes a plug that when pushed (with a pick, ballpoint pen, etc), comes out completely leaving no residue or mess in the nozzle, doesn't adhere to it at all. Also don't attempt to clean the RTV out of the nozzle while it's still wet, you're either going to need solvents which will damage the plastic, or you're just going to spread the RTV thin on the walls of the nozzle and when it dries you're going to have to scrape the inside up to flake it off. Keep it simple, leave the mass of RTV in there whole so that it all comes out together as one piece/plug.
P**O
Great product
Product always works great
J**E
Reliable Sealant for High-Torque Applications
I absolutely love the Permatex 25228 Ultra Grey RTV Silicone Gasket Maker for my car repair projects. It consistently delivers a strong, durable seal that can withstand pressure, making it perfect for high-torque applications. The quick setting time and ease of application have made my repair process much smoother. I particularly appreciate that it's sensor-safe and non-corrosive, ensuring the safety of sensitive engine parts. The 13 oz tube size is just right for multiple uses, and the long-lasting results speak for themselves. Say goodbye to leaks and shifting gaskets - this product keeps everything in place reliably. I highly recommend this for anyone in need of a trustworthy sealant.
S**W
It is the right stuff. Use it
Its the best at sealing up just about any automotive parts where gaskets are needed.
S**M
Simple and effective for quick setups
Satisfied with how quickly it assembles and how it performed during a trial. It didn’t leak at all and held steady. Happy I chose this one instead of delaying the purchase.
S**N
Works great for quick repairs
Zipping through a weekend project, i used this Permatex gasket maker to seal a small engine part. it’s handy and sets pretty fast which saved me time. no leaks so far and it held up well during a test run. really glad i grabbed this instead of waiting around.
J**E
No leaks
Used this on my 19 cx5 transmission pan. No leak as of yet so 5 star it is! Vehicle running great.
J**.
Excelente
Excelente pegado y tiempo de secado hace una JJ ta perfecta
J**E
Bon produit
Bon produit
G**H
Great Gasket maker
Great Gasket maker
D**N
Qualité
Tres bon produit
J**.
Bueno
Mandan lo que publican muy buen producto
Trustpilot
4 days ago
1 month ago