The Ford Barn

Burgie · 05-07-2024, 01:54 PM

Has anyone had success using high temp silicon sealer on flathead exhaust manifolds? A friend suggested Peratex Ultra Black.

Kube · 05-07-2024, 02:17 PM

Quote:

Originally Posted by Burgie

Has anyone had success using high temp silicon sealer on flathead exhaust manifolds? A friend suggested Peratex Ultra Black.

I'm guessing you are referring to the area between the manifold and the block, IE the gasket. Yes?

If so, there are special sealers for exhaust systems. Permatex silicone is NOT one of them.

Occasionally the need for two gaskets sandwiched together with sealer does the trick rather well.

GB SISSON · 05-07-2024, 02:18 PM

Sponsored Links (Register now to hide all advertisements)

I would suggest you look into Remflex compressible manifold gaskets. I have bought multiple sets for flathead V8. They are good for a couple thousand degrees and squish to fill gaps in such things as warped headers. My local Napa store can usually get them the next day for most applications.

05-07-2024, 01:54 PM	#1
Burgie Junior Member Join Date: May 2010 Posts: 29	1936 Exhaust manifold sealer Has anyone had success using high temp silicon sealer on flathead exhaust manifolds? A friend suggested Peratex Ultra Black.

05-07-2024, 02:18 PM	#3
GB SISSON Senior Member Join Date: Jan 2014 Location: Orcas Island Washington Posts: 5,064	Re: 1936 Exhaust manifold sealer Sponsored Links (Register now to hide all advertisements) I would suggest you look into Remflex compressible manifold gaskets. I have bought multiple sets for flathead V8. They are good for a couple thousand degrees and squish to fill gaps in such things as warped headers. My local Napa store can usually get them the next day for most applications. __________________ Owner/Operator of 'Jailbar Ranch' on the side of Mt. Pickett. Current stable consists of 1946 1/2 ton pickup turned woodie wagon with FH V8, 1946 Tonner Pickup with 226 H six, 1979 Toyota landcruiser wagon, now wearing 1947 Ford Jailbar sheet metal. 'Rusty ol' floorboards, hot on their feet' (Alan Jackson)