Hellfire
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posted on 23/6/06 at 08:21 AM |
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Flexible Exhaust Sealant
We've just had a quieter can fitted. However, now there is more resistance it's finding out the gaps up front! Between the headers and the
collector is the main culprit. As the exhaust is semi-rigid any attempt to seal this joint using typical hardening exhaust cement simply pop's
out upon contraction.
Is there such a thing as flexible exhaust sealer that can withstand the 600oC+ temperature at that part of the exhaust?
Second to that, it means mounting the rear of the exhaust can using a more flexible method...
Steve
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pewe
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posted on 23/6/06 at 08:50 AM |
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The man who fabricated my system recommended the flex. silicone sealant used by central heating installers - suggested beer tokens to your local
British Gas van man would resolve it. Can't say it will work as I haven't fired it up but he does everything incl. old F1 cars so knows a
trick or two. Cheers, Pewe
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andyharding
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posted on 23/6/06 at 11:39 AM |
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Yep, silicone (bathroom type) sealant is the stuff to use. Pongs a bit tho!
Are you a Mac user or a retard?
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DarrenW
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posted on 23/6/06 at 01:08 PM |
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Ive used bathroom silicon to seal back box to manifold (stainless system) but would be hesitant about using it further forward. Is it really Ok in
high heat applications?
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UncleFista
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posted on 23/6/06 at 02:28 PM |
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The "proper" exhaust silicone (at least the tube I was looking at) said it was good up to 360 degrees. Obviously different brands will
probably say different temps...
Tony Bond / UncleFista
Love is like a snowmobile, speeding across the frozen tundra.
Which suddenly flips, pinning you underneath.
At night the ice-weasels come...
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Hellfire
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posted on 23/6/06 at 03:24 PM |
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I've found this product...
http://www.intek-uk.com/XTS320data.html
Possibly the highest temperature adhesive/sealer on the market and high very high percentage of Silicon so stable'ish at VHT... waiting for a
price.
We've tried Silicon Bathroom Sealer - it just breaks down to a powder and drops off.
Steve
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MkIndy7
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posted on 23/6/06 at 04:06 PM |
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Think i've got some Silicone sealant in the Garage thats rated to 400 or even 600 DegC Called Plumba Flue, as the name would suggest for sealing
flues
Thats stays as flexible as silicone and is good stuff, definately worth a try.
If thats not high enough there's Boiler Assembly mastic (not sure of a trade name and harder to get hold of) thats used imbetween the sections
of Cast Iron Boilers to prevent combustion chamber gases leaking so thats even higher temps. Not sure how flexible that would remain.
The Plumba flue should be available at your local PlumbCentre etc but the boiler mastic may be harder to find.
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JoelP
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posted on 23/6/06 at 07:12 PM |
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i need some of this stuff too, along with a tig welder keep us posted!
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owelly
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posted on 25/6/06 at 07:12 AM |
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I'm suprised at the bathrom silicon sealer not working as I use it all the time for sealing exhausts from the manifold down to the back box.
I've used it on turbo's and bikes with no probs. It may be down to the different brands.....
http://www.ppcmag.co.uk
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Chazzy
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posted on 25/6/06 at 06:16 PM |
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can you remember which brands have worked for you and not turned to powder?
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locoboy
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posted on 26/6/06 at 01:07 PM |
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There is a wood burning stove showroom next to my work and the lads there use that plumaflue stuff when fitting woodburners, thats what i will be
using on my exhaust too.
ATB
Locoboy
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MkIndy7
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posted on 26/6/06 at 08:38 PM |
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Just been out to the other Garage and found the PlumbaFlue, its rated to 300 Deg Max and 250 Deg Sustained Temperature.
There's also a substance called FJC Flue Jointing Compound thats rated to similar temperatures with a texture like putty but not sure how that
holds up over time, just a little bit better than Fire Cement really for what we use it for.
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paulf
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posted on 26/6/06 at 09:43 PM |
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I used some Dow Corning firestop 700 , it is used to fill gaps around fire doors etc and has a 4 hour fire rating in that application.It is a silicon
type but never actually sets fully. It is sold bt RS components.
Paul.
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