S/S Permatex® - Ultra Red RTV Silicone Gasket Maker up to 650oF Sealant - 3 oz / 85g

I used the Permatex Ultra Red 81630 on a high-heat automotive application, and it performed exactly as expected. It spreads easily, creates a strong, flexible seal, and handles high temperatures without cracking or shrinking. The curing process was straightforward, and once fully cured, it provided a leak-free seal. It's perfect for exhaust manifolds, headers, turbo components, and other high-temperature areas. The 3 oz tube is easy to use and provides enough material for several repairs. I would definitely buy it again for future automotive projects.

Excellent

I’m using this to fix my oil pan gasket. Worth the money.

Just the rtv you expect from permatex. High quality sealant I've used for years. Buttoned up my old Fiat with a tube of this stuff and haven't seen any leaks or weeps anywhere I used this. Great to have around the garage for when you dont have a gasket on hand

Hi temp RVT is just what I needed for my valve cover gaskets on my cup cadet mower thank you so much works perfect