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Your cart is empty.Permatex Ultra Blue Multipurpose RTV Silicone Gasket Makers are sensor-safe, low odor and non-corrosive, with outstanding oil resistance and joint movement values. Developed to meet today's technology changes, Permatex ultra silicones are eight times more flexible than cork/composite gaskets and three times more oil resistant than conventional silicones. With a temperature range of -65 degrees fahrenheit to 500 degrees fahrenheit intermittent, these OEM specified gaskets resist auto and shop fluids, as well as vibration. These gasket makers offer significant performance advantages, excellent torque retention and hi-temp, sensor-safe properties. Permatex always has the right gasket maker for your application.
Pawsrdog
Reviewed in the United States on March 9, 2025
I use this on oil pan gaskets and such. Worked great and does not harm anything. It has fixed several oil leaks on lawn mowers, cars and some other small engine work I have done.
KC Rave
Reviewed in the United States on September 17, 2023
I got this to replace the last tube I bought. It was only 1/2 used, but cured in the tube after 3 or 4 years in the garage. I found it to be very good to patch small holes-tears in my ATV seats. Did buy again. Will buy again. Oh.. makes good gaskets too!
peterj16
Reviewed in the United States on October 4, 2023
Amazing product.
Ray W
Reviewed in the United States on September 28, 2022
dry to long
COP
Reviewed in the United States on September 16, 2020
Used this to seal up an emergency hand crank on a Landing Gear transmission. It was easy to apply and works Great!
Ben J. Anson
Reviewed in the United States on December 18, 2020
I've used permatex products for many years for many things and have been impressed with nearly every application I have tried it on. Better than regular RTV silicones for jobs that will be exposed to oil products.
Rich
Reviewed in Canada on April 18, 2020
worked great
DCFusor
Reviewed in the United States on July 14, 2019
Surprise - this is one of two silicones that are useful in the lab as well as in the garage. This one doesn't emit ammonia in curing, (that's the sensor safe thing) and has a near zero vapor pressure once cured, making it valuable to seal tiny leaks in vacuum systems at a tiny fraction of the cost of the "pro" stuff sold to those who don't know this.Yes, it works on your auto, too.The other good one is the red hi-temp stuff (but for different reasons) - it's very hard to ruin the red stuff with heat....
Customer
Reviewed in the United States on April 19, 2017
Works well as a gasket. It was a bit harder to squeeze out of the tube than expected. I opened the hole up all the way and was laying a fairly decent sized bead, but still had to squeeze the heck out of the tube to get it to come out. This made it a little more difficult to lay a consistent, smooth bead across the surface. That said, the important part is the sealing and so far it's worked like a gem.
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