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displaying posts 1 to 9 of 9
| Author | Subject: Exhaust Sealent |
 oliverharveyuk@hotmail.co.uk
Regular  Location: Banbury Registered: 16 Feb 2016 Posts: 231 Status: Offline |
Post #1
I have never fitted an exhaust before and looking to replace the full system from manifold back, any recommendations on exhaust paste? I've read that paste is rubbish and will go brittle and fall away so to use silicone, but apparently this can have an effect on the lambda sensor?________________________________________ 98 Blaze 6 - Current |
 Posted 15th Mar 2017 at 14:22
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mocinim
Seasoned Pro  Location: The Darkside of bedford :) Registered: 09 Jan 2015 Posts: 2,307 Status: Offline |
Post #2
Holtz or car plan there much the same they both work fine every time for me No paste at the cat engine side just a new gauze gasket n kit (dont crush the springs ) ________________________________________ BLACK RALLYE - phoenixWHITE RALLYE - valliant http://public.servicebox.peugeot.com/ https://www.gov.uk/check-mot-history |
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Posted 15th Mar 2017 at 15:53
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gnrlee
Forum Admin Location: Leeds Registered: 20 Aug 2005 Posts: 8,878 Status: Offline |
Post #3
Holtz stuff is crap and cracks eventually!Just buy clear silicone sealent from Wilcos etc That does a cracing job! ________________________________________ Proud Member of the ASTOR Owners Club |
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Posted 15th Mar 2017 at 17:54
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Day666
Seasoned Pro  Location: Bristol Registered: 20 Apr 2013 Posts: 5,209 Status: Offline |
Post #4
For god sake don't use silicon on mild steel as it will corrode it crazy quick ...use it on stainless Yes |
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Posted 15th Mar 2017 at 18:50
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gnrlee
Forum Admin Location: Leeds Registered: 20 Aug 2005 Posts: 8,878 Status: Offline |
Post #5
Ive never heard of silicone desolving mild steel???  Edit: justchad a quick look into this you can get acid etch based silocone which is a bad idea polyurethane based seems to be ok to use, and the brand of choice seems to be Sikaflex ill look at the wilco stuff I use is A polly type but ive never had any corrosion and ive been using this method for about 7yrs  ________________________________________ Proud Member of the ASTOR Owners Club |
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Posted 15th Mar 2017 at 19:06
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phillipm
Seasoned Pro  Location: Rotherham Registered: 15 Oct 2006 Posts: 20,607 Status: Offline |
Post #6
A lot of silicone cures via an acidic reaction so it can corrode the steel surface. But frankly it's an exhaust that's probably already corroded as feck anyway  Polyurethane doesn't resist the temperature like silicone, most automotive sealants are very low on the acid cure anyway as they are intended to be used on steel and alloy, unlike the bathroom sealant types - hence the really acrid smell from the bathroom stuff vs gasket seal versions. I've never had an issue using automotive silicone on exhausts tbfh. ________________________________________ - Bespoke rollcages/additions/adjustments. Half cages right up to complete custom spaceframes - MSA/FIA spec, CDS, ROPT, T45, etc - PM meEmail me! Custom-made polybushes available - need an odd size or fitment? - anything from batch work to one-off pieces. |
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Posted 15th Mar 2017 at 19:20
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Day666
Seasoned Pro Location: Bristol Registered: 20 Apr 2013 Posts: 5,209 Status: Offline |
Post #7
I should of said don't use bathroom Silicon  I've used Wurth Automotive Silicon sealant which are great but cheap bathroom Silicon sealant will cause you issues |
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Posted 15th Mar 2017 at 20:09
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oliverharveyuk@hotmail.co.uk
Regular Location: Banbury Registered: 16 Feb 2016 Posts: 231 Status: Offline |
Post #8
So I should go for automotive silicon? Didn't realise it would be so technical... Would this be okay? sealent ________________________________________ 98 Blaze 6 - Current |
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Posted 15th Mar 2017 at 19:54
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Day666
Seasoned Pro Location: Bristol Registered: 20 Apr 2013 Posts: 5,209 Status: Offline |
Post #9
oliverharveyuk@hotmail.co.uk wrote: So I should go for automotive silicon? Didn't realise it would be so technical... Would this be okay? sealent That looks spot on Bathroom silicon should only be used on metal bathroom items that are plated...e.g. Chrome / Nickel / brass etc |
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Posted 15th Mar 2017 at 20:11
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