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Old Aug 21, 2012, 03:39 PM
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United States, AL, Foley
Joined Jul 2011
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Question
Ultra copper sealant

How long does it need to cure before running eng.? I replaced the pitts muffler on a dle 30. Thanks
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Old Aug 21, 2012, 09:43 PM
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earlwb's Avatar
USA, TX, Grapevine
Joined Dec 2008
12,322 Posts
I would suggest overnight at the very least, 24 hours is better.
The instructions say to apply the bead, re-assemble, but do not tighten down all the way, stop when it starts oozing out between the parts, then wait at least two hours better is overnight.
Other guys who use it just go ahead and start using their engine after they re-assemble everything. The tube of stuff can go bad after some long period of time and then it stops curing on you.
ref http://www.google.com/url?sa=t&rct=j...8kd_EQ&cad=rja
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Last edited by earlwb; Aug 21, 2012 at 09:52 PM.
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Old Aug 21, 2012, 09:58 PM
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Fokker DII's Avatar
USA So. Cal.
Joined Sep 2010
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+1 at least overnight. I used it on Saito mufflers and it is the only thing that keeps them tight. Great stuff if you let it cure.
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Old Aug 23, 2012, 04:31 PM
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United States, AL, Foley
Joined Jul 2011
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Copper sealant

Thanks for the info. Iwill wait overnight and try it.
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Old Aug 26, 2012, 07:34 PM
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Mikecam's Avatar
Canada, MB, Winnipeg
Joined Apr 2008
919 Posts
I've had better luck just tightening down the muffler and waiting over night. It seemed to me that the sealant was skinning over and blowing out to easy when doing the finger tight for one hour first method. Also take some 200 grit sand paper to both surfaces to scuff them before mating.
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