Permatex 27038 Optimum Red High Temperature Gasket Maker, 3 oz

One of the best and most affordable brands high temp RTV silicone. I use it for ceiling fittings on liquid culture jars used for mycology so they can be sterilized in an autoclave with no problem. Works great keeps a great seal and easy to use.

Great purchase and fast delivery!

Used this to seal the thermocouple/thermopile/pilot on a Vermont casting fireplace. Worked perfectly.

I use this on my custom built exhaust systems and never any exhaust leaks.

Exactly the same thing as you get at the parts store at a better price

Worked well...thx

Great stuff for what I need it for. I use it in mushroom cultivation. To seal jars and use as injection ports. I recommend to anyone doing the same. Easy to use great price. Durable up to 500°. I use in boiling water no leaks. Easy cleanup

I use this stuff on everything......it works great !!!