

🔥 Seal the deal with Ultra Copper – where performance meets precision!
Permatex Ultra Copper RTV Silicone Gasket Maker is a professional-grade, high-temperature silicone sealant designed for automotive exhausts and engines. It withstands extreme temperatures up to 700°F, offers superior flexibility and oil resistance, and is sensor-safe with low odor and non-corrosive properties. Trusted by mechanics and enthusiasts alike, it ensures durable, leak-proof seals on modern high-performance engines and components.




| ASIN | B0002UEOPA |
| Best Sellers Rank | 6,100 in Automotive ( See Top 100 in Automotive ) 86 in Fillers, Adhesives & Sealants |
| Brand | Permatex |
| Colour | Copper |
| Customer Reviews | 4.7 4.7 out of 5 stars (3,091) |
| Date First Available | 16 Aug. 2010 |
| Item Weight | 85 g |
| Material | Silicone |
| Model Number | 81878 |
| Product Dimensions | 20.32 x 10.16 x 5.08 cm; 85 g |
R**1
Good sealant
Easy to use with nozzle and sets to form a gas tight seal
A**Y
Great Product.
This is a product that I use for securing a muffler to a Saito engine and it never vibrates loose. Well pleased and many thanks.
M**T
Love it
It works
J**S
Works well
Good product, used to repair a gasket on ceramic bbq. Bottle lid broke after a few weeks
B**C
Does the job
Does what it says, easy to use and no issues
S**G
No more leaks!
I had constant issues stopping my motorbike exhaust from leaking and losing back pressure but this stuff is brilliant! Much better than other exhaust sealing compounds which go hard, brittle and fall out after a few hundred miles. Very impressed!
I**L
What you see is what you get
As described
M**X
Perfect
Excellent for sealing up exhausts
G**O
説明書通りに使えばきちんと効果を発揮します。 そして剥がしやすい。
E**O
Este sellador de silicona de alta temperatura ha funcionado de manera excelente en las uniones del escape de mi motocicleta. Su resistencia al calor extremo garantiza un sellado duradero sin deteriorarse con el tiempo. La aplicación es sencilla y la adherencia es muy buena, asegurando que no haya fugas ni vibraciones molestas en las conexiones. Además, su formulación a base de cobre proporciona una excelente conductividad térmica y estabilidad en condiciones exigentes. En general, un producto confiable y altamente recomendable para sellar uniones expuestas a altas temperaturas, como sistemas de escape y componentes de motor. ¡Gran desempeño!
L**L
Sehr gutes Produkt.
S**D
good brand & product
J**E
Product works very well, let is harden for at least 24 hours ! Exhaust leak resolved.. A+
Trustpilot
1 month ago
3 weeks ago