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  • Permatex 81878-12PK Ultra Copper Maximum Temperature RTV Silicone Gasket Maker, 3 oz. (Pack of 12)
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Permatex 81878-12PK Ultra Copper Maximum Temperature RTV Silicone Gasket Maker, 3 oz. (Pack of 12)


Price: $48.22 & FREE Shipping. Details
Only 4 left in stock (more on the way).
Ships from and sold by Amazon.com.
3 Ounce (Pack of 12)
  • Most advanced, high temp RTV silicone gasket available
  • Three times more oil resistant than conventional silicones; eight times more flexible than cut gaskets
  • Sensor-safe, low odor, and non-corrosive with superior adhesion
  • Temperature range -75F to 700F intermittent
  • Suggested Applications: Exhaust manifolds/headers, valve covers, oil pans, timing covers, water pumps, thermostat housings
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5 new from $47.99
$48.22 & FREE Shipping. Details Only 4 left in stock (more on the way). Ships from and sold by Amazon.com.

Frequently Bought Together

Permatex 81878-12PK Ultra Copper Maximum Temperature RTV Silicone Gasket Maker, 3 oz. (Pack of 12) + 1 Mil Kapton Tape (Polyimide) - 1/2" X 36 Yds
Price for both: $57.17

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Product Information

Size: 3 Ounce (Pack of 12)
Technical Details
BrandPermatex
Item Weight2.9 pounds
Product Dimensions8.9 x 8.4 x 4.3 inches
Item model number81878-12PK
Manufacturer Part Number81878-12PK
  
Additional Information
ASINB001REZA1W
Best Sellers Rank #77,684 in Automotive (See top 100)
Shipping Weight3 pounds (View shipping rates and policies)
ShippingCurrently, item can be shipped only within the U.S.
Date First AvailableApril 1, 2004
  
Warranty & Support
Warranty, Parts: Parts

Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.
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Product Description

Size: 3 Ounce (Pack of 12)

Permatex Ultra Copper Maximum Temperature RTV Silicone Gasket Maker is the most advanced, high temp RTV silicone gasket available. Three times more oil resistant than conventional silicones and eight times more flexible than cut gaskets, it is sensor-safe, low odor, and non-corrosive with superior adhesion. Highest operating temperatures for 4-cylinder, turbocharged or high-performance engines and OEM specified, with a temperature range of -75 degrees fahrenheit to 700 degrees fahrenheit intermittent. Also resists auto and shop fluids and vibration. These gasket makers offer significant performance advantages, excellent torque retention and hi-temp, sensor-safe properties. Extended warranties, engine sensors and new component materials such as aluminum, bi-metal alloys and high-tech plastics, have created the need for superior RTV silicone gasket makers in both OEM production and service applications. Permatex always has the right gasket maker for your application.

Customer Questions & Answers

Customer Reviews

Exactly what I needed for the job.
Wayne M.
Works great as an adhesive too, as it dries to a strong rubber-like texture.
Smithsonite
Works well for sealing exhaust leaks.
brian major

Most Helpful Customer Reviews

19 of 20 people found the following review helpful By Smithsonite on May 13, 2011
Size Name: 3 Ounce Tube Verified Purchase
Been using this stuff for over 15 years on everything from cars/trucks, to motorcycles, lawn equipment, & even the coal stove. Works great as an adhesive too, as it dries to a strong rubber-like texture. Needs a bit of time to cure, but once it does it forms a pretty strong bond. I once used it in place of the differential cover gasket in a '86 Grand Marquis - lasted over 6 years before it started weeping gear oil. The color is ugly, but the stuff works.
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7 of 7 people found the following review helpful By R. Bowlin on April 16, 2012
Size Name: 3 Ounce Tube Verified Purchase
I bought this to provide an added seal to the connection point of the FMF SST Gold Series pipe and the FMF Power Core 2 Silencer on my 2001 KX250 MX bike. I was getting a steady amount of burnt two-stroke oil dripping from the connection point and wanted a quick fix. I put a good bead of this silicone all around the connection point and let it dry overnight. By the next day it had set up nicely and was ready to go. As the other reviewer stated, it dried an ugly burnt orange color, but it sealed the leak 100%.
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7 of 8 people found the following review helpful By Dave78 on August 11, 2012
Size Name: 3 Ounce Tube Verified Purchase
Used this with a Rutland Inc Gasket Kit Tape 7'x5/8" 95-6 to replace the useless seal that my Large Big Green Egg came with. Just replaced the bottom seal only, removed the top seal completely. Worked fine and has held up over time with both high them searing and low temp smoking.
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4 of 5 people found the following review helpful By texan_176@yahoo.com on December 10, 2012
Size Name: 3 Ounce Tube Verified Purchase
I purchased this for a friend's Honda that was having major oil leakage from the distributor. The factory O-rings were replaced but the car would leak after only a few months again. The cylinder head is the location of the most hot part of an engine (the exhaust valve) and in this case the distributor shaft is pretty much spinning in scalding hot oil all of the time. Allowing it to cure overnight at a minimum is suggested if you have the time. The leak was gone and the liquid gasket was working well. I have also used this stuff as an exhaust paste on joints and to seal the manifold to the cylinder head. It stands up to heat very well. I would not hesitate to use it again.
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2 of 2 people found the following review helpful By opinions are like A_ _ holes on February 19, 2013
Size Name: 3 Ounce Tube Verified Purchase
as will most permatex products this is good stuff. it has a good high heat tolerance and stays where it is put.
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1 of 1 people found the following review helpful By JTH on April 25, 2012
Size Name: 3 Ounce Tube
Used this to seal up some prototype biomass furnaces. I applied it to a warm furnace and it worked fine.

I once used some cheap general purpose silicone for a high temperature application and it turned into a sticky mess that never cured. Must of had some weird fillers in it. Use the right material for the application.
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1 of 1 people found the following review helpful By Dave421 on March 20, 2014
Size Name: 3 Ounce Tube Verified Purchase
I don't get much chance to work on cars any more but I've discovered that this works great to replace the gaskets on Kamado grills. Most other adhesives can't handle the heat but a small bead of this under the gasket works great.
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1 of 1 people found the following review helpful By Samuel A. on January 16, 2015
Size Name: 3 Ounce Tube Verified Purchase
Got this for my Rostock Max v2 build and it worked great. Still have lot of extra and highly recommended. If you are building a 3D printer, this is a must for those thermistors and other critical parts that take a lot of heat.
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Permatex 81878-12PK Ultra Copper Maximum Temperature RTV Silicone Gasket Maker, 3 oz. (Pack of 12)
This item: Permatex 81878-12PK Ultra Copper Maximum Temperature RTV Silicone Gasket Maker, 3 oz. (Pack of 12)
Price: $67.99 $48.22
Ships from and sold by Amazon.com