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High temp RTV as exhaust gasket?

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High temp RTV as exhaust gasket?

Old 11-01-2012, 07:30 PM
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Sigma.40
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Default High temp RTV as exhaust gasket?



My exhaust came off while out running the 5SC and I am now missing the exhaust gasket (stock can). Would high-temp RTV work as a gasket temporarily? It looks like I'm going to have to order one, but I want to run it while I can as snow is quickly coming. Would it be bad to just run it for a few tanks without ANY gasket?

Old 11-02-2012, 10:07 AM
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Default RE: High temp RTV as exhaust gasket?

If your stuck you could give rtv sealant a try,

Just apply it to the exhaust can and don't install it for around an hour,

this should give it some time to turn slightly rubbery and will seal better once fitted.
Old 11-02-2012, 04:20 PM
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Default RE: High temp RTV as exhaust gasket?

it'll probably blow it out..order yourself a copper exhaust gasket and use high temp (grey permatex)on both sides and then tighten it...it'll never leak
Old 11-02-2012, 04:44 PM
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Default RE: High temp RTV as exhaust gasket?

I ordered a gasket, but out of curiousity, what would happen if I went without a gasket?
Old 11-02-2012, 07:38 PM
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Default RE: High temp RTV as exhaust gasket?

your motor will be an oily mess. use a gasket.
Old 11-03-2012, 04:16 AM
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Default RE: High temp RTV as exhaust gasket?


ORIGINAL: savagecommander

your motor will be an oily mess. use a gasket.
Yes sir. Will do.
Old 11-04-2012, 05:03 AM
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Default RE: High temp RTV as exhaust gasket?

the gasket helps to seal... it fills in any inprefections within the mating surfaces
Old 11-04-2012, 08:17 AM
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Default RE: High temp RTV as exhaust gasket?

Cut a new one out of thin cardboard, it'll work a lot better than RTV, which will probably just blow out. You can also get exhaust gaskets for these engines at just about any small engine repair shop.
Old 11-04-2012, 10:11 AM
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Default RE: High temp RTV as exhaust gasket?


ORIGINAL: proanti1

Cut a new one out of thin cardboard, it'll work a lot better than RTV, which will probably just blow out. You can also get exhaust gaskets for these engines at just about any small engine repair shop.
Won't the cardboard burn up? I have one on order but if that works thats incredibly useful knowledge for next time.
Old 11-04-2012, 02:57 PM
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Default RE: High temp RTV as exhaust gasket?

When in need i have used thin cardboard (milk carton) and wrapped it in tin foil. You might be lucky without wrapping it in tin foil too. In fact i have used milk carton on my moped to seal the bottom of the cylinder on it, this kept up well without blowing.
Old 11-04-2012, 03:17 PM
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Default RE: High temp RTV as exhaust gasket?

I just tried the cardboard and it worked good.

-Completely off-topic but I just realized that today was the first time I've taken the temp on my Baja. It was 197.6F at the cooling fins on the head and 243F on the exhaust. Are these good?

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