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Permatex 27037 Optimum Black Gasket Maker is a premium silicone-based sealant engineered for modern lightweight and premium automotive components. It offers 15% greater strength and 60% more flexibility than Ultra Black, withstanding extreme temperatures from -65°F to 500°F. Sensor-safe and resistant to oil, shop fluids, and vibration, it’s ideal for valve covers, oil pans, and other critical seals. Comes with two nozzles for precise application, ensuring a professional-grade, leak-proof finish trusted by thousands of mechanics and DIYers alike.
| ASIN | B072MRCG8W |
| Best Sellers Rank | #14,754 in Automotive ( See Top 100 in Automotive ) #69 in Automotive Fillers, Adhesives & Sealants |
| Brand | Permatex |
| Brand Name | Permatex |
| Color | Optimum Black |
| Compatible Material | Rubber |
| Customer Reviews | 4.6 out of 5 stars 1,592 Reviews |
| Global Trade Identification Number | 00686226270375 |
| Included Components | Gasket Maker |
| Item Dimensions | 32 x 97 x 203 millimeters |
| 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 | 32 x 97 x 203 millimeters |
| Item weight | 0.11 Kilograms |
| Manufacturer | Permatex |
| Material | Silicone |
| Material Type | Silicone |
| Model | 27037 |
| Number of Items | 1 |
| Part Number | 27037 |
| Style | Pack of 1 |
| Style Name | Pack of 1 |
| Surface Recommendation | Miscellaneous |
| UPC | 686226270375 |
| Unit Count | 1 Count |
| Water Resistance Level | Water Resistant |
| Water resistance level | Water Resistant |
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.
L**E
Excellent
Excellent Used to install a crankcase/crankshaft oil seal on a Lycoming engine
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.
J**.
Durable and Versatile – Excellent Gasket Maker for Oil Resistance
The RTV silicone gasket maker is an excellent product for sealing engine parts that need maximum oil resistance. I’ve used it for valve covers and oil pans, and it has held up perfectly under harsh conditions, even with high temperatures and constant exposure to oil. The application is straightforward, and it forms a strong, durable seal that doesn’t leak once cured. It dries quickly and provides a solid, long-lasting bond that is resistant to oil, water, and other fluids. Overall, it’s a high-quality gasket maker that does exactly what it promises. Perfect for anyone needing a reliable sealant for automotive or other oil-resistant applications. Highly recommend!
Trustpilot
1 week ago
1 day ago