Permatex 81878 #101 Sensor Safe Ultra Copper Hi Temp RTV, 3 oz. Tube
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Customer Review
Over 15 years & still works great
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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Good Stuff
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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Super Sealant
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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Product Description
The most advanced, high temp RTV silicone gasket available. Highest operating temperatures for 4-cylinder, turbocharged or high-performance engines. Top to learn more


