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Permatex 27037 Optimum Black Gasket Maker is a premium silicone-based sealant engineered for high-performance automotive applications. It offers superior oil resistance, exceptional flexibility, and a wide temperature tolerance from -65°F to 500°F. Designed for sensor-safe use on modern lightweight components, it delivers a 15% stronger bond than Ultra Black and includes dual nozzles for precise application, making it the go-to choice for professionals demanding durability and reliability.
| ASIN | B072MRCG8W |
| Best Sellers Rank | #57 in Automotive ( See Top 100 in Automotive ) #1 in Gasket Sealers #983 in Oils & Fluids |
| Brand | Permatex |
| Brand Name | Permatex |
| Color | Optimum Black |
| Compatible Material | Metal, Rubber |
| Customer Reviews | 4.8 out of 5 stars 683 Reviews |
| Global Trade Identification Number | 00686226270375 |
| Included Components | Gasket Maker |
| Item Dimensions | 1.25 x 3.81 x 8 inches |
| Item Form | Paste |
| Item Type Name | Optimum Black Gasket Maker 3.35 oz |
| Item Weight | 0.11 Kilograms |
| Item dimensions L x W x H | 1.25 x 3.81 x 8 inches |
| Manufacturer | Permatex |
| Material | Silicone |
| Material Type | Silicone |
| Model | 27037 |
| Number of Items | 1 |
| Part Number | 27037 |
| Style | Optimum |
| Style Name | Optimum |
| Surface Recommendation | Miscellaneous |
| UPC | 686226270375 |
| Unit Count | 1.0 Count |
| Water Resistance Level | Water Resistant |
J**C
Gasket maker.
Easy to use. Perfect for assembling multiple parts together.
R**T
Excellent sealer with real grip
I can't say this stuff is easy to remove once applied as the only time I had to remove a piece I had used the product on it put up a heck of a fight coming off. That proved that it had created a tight seal which is what I wanted. Vibration wasn't going to lossen it that's for sure. Application can be messy if you get in a hurry but its ability to create a tight seal with a firm holding power would be hard to duplicate this side of a weld.
I**7
Highly recommend gasket maker
I brought this gasket maker when I was changing my CRV engine gasket. Very easy apply, dry very quick and adhesion very well. So far I don't see any issues and durability is good. It's very easy use making gasket and comes with everything you need. Good price for quality products.
A**4
Good gasket maker, but watch the cure time
I have used Permatex products for years. I tried the Optimum Black because it's supposed to have the highest oil resistance. The product works well. The only issue is that you have to be careful of the cure times. At lower temperatures this sealant will take more than 24 hours to cure. I used it on a valve cover in a garage that was 45 degrees and it took several days to fully cure.
R**R
Gasket maker
Works motorcycle has new gasket and the sealer helped
D**K
Seems to be working great.
It seems to work as advertised. I have not had any leaks since using it.
M**C
As advertised. Fast service. Would use again.
As advertised. Fast service. Would use again.
J**S
Great product !
works great
G**S
Excellent Product
Excellent and supreme quality product for sealant.
A**R
Great stuff
Great stuff, works exactly as advertised. Easy to use, good seal.
A**S
Creme de le creme product
Best gasket maker " silicone" on the world market. Very generous on the assembly time,unlike most that set up in just a few minutes.
L**E
Excellent
Excellent Used to install a crankcase/crankshaft oil seal on a Lycoming engine
Trustpilot
5 days ago
3 weeks ago