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Ask an Expert Exhaust gasket replace with silicone? Technical

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Jul 09

Posts: 17

Redpastyboy says:

Exhaust gasket replace with silicone?

I have bought a second hand slip-on exhaust. The pipe that connects to the end pipe is slightly out of shape and the gasket does not fit in correctly. When trying to fit the exhaust the gasket gets pushed too far down the inside and does not sit correctly. Would if be possible to use a silicone sealant instead of the gasket? I have seen a sealant in Halfords that is heat resistant. Would this be ok?

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  • Posted 3 years ago (19 May 2012 20:30)

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Apr 10

Posts: 115

tim8061 says:


If you look at the spec on normal bathroom silicone sealant it's temp resistant to ~250 c ISTR. I've used it on exhaust joints without a problem.

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Mar 09

Posts: 8933

jaffa90 says:


I`ve used instant gasket which is high temp silicone,

if the gap is too big try foil as well.

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