my exhaust won't seal

[tonaz]

i have tried everything to get the joins in my exhaust to seal but they just won't. there seems to be too much moisture getting through the joins and it is causing the paste to come away.

can anyone help?

 

[davebem]

What paste are you using?? I borrowed some silicone stuff off my old man to do mine and its sealed perfectly.

 

[Russ.]

What paste are you using?? I borrowed some silicone stuff off my old man to do mine and its sealed perfectly.

I had a garage seal my exhaust using silicone as opposed to the paste which dries solid and touch wood its been great now for a good few months.

Previously it would last a week, if that before the exhaust movement ruptured a hole in the paste.

 

[tonaz]

been using holts firegum. what silicone stuff did you use? cheers

 

[pete_clio]

ive used bosal stull, it seems to be the ticket. making sure all the clamps are tight etc

 

[tonaz]

what's bosal stull? can't seem to find it?

 

[Jamesstone]

Holts fire gum worked a treat for me, like said above, check all the clamps are tight


James

 

[tonaz]

i can't tighten them anymore like. it's doing me head right in!

 

[r8byb]

In all honesty a exhaust should seal without paste.. something must be wrong.

 

[Fred@BTM]

never use paste, its not a metro

Silicone will do it

 

[tonaz]

what exact product should i be buying for this? so i make sure i get the right stuff?

what else could be the issue? there are no visible gaps in the joins

 

[MarcoB]

It probably just fits like a chicken's lip. Take the join apart, put paste/ silicone on the inside and outside of the joining pipes then get it on as far as possible and then tighten up the clamps. Give it some heat if you need to then check if it leaks.

 

[elmo2002]

what silicone do you use? just standard run of the mill silicone?

 

[mgoode180566]

Dont get any in your eyes. I did and it friggin kills !

 

[tonaz]

b****cks. a really don't fancy pullin' the whole thing apart. oh well.

will any standard silicone sealant do?

 

[tonaz]

Dont get any in your eyes. I did and it friggin kills !

haha i'll try! cheers for the warning!

 

[bmh.01]

b****cks. a really don't fancy pullin' the whole thing apart. oh well.

will any standard silicone sealant do?

Needs to be high temp resistant stuff, i've not had any problem with firegum though tbh.

 

[clio_luke]

high temp silicone should do it. iirc its normally red in colour

 

[tonaz]

is my exhaust likely to get hotter than 350 degrees c?

 

[tonaz]

http://www.fluesystems.com/sundries/info/flexseal.htm

does this look like the right stuff?

 

[Rob.]

I never use paste.
Have forgotten silicone in the past as well and still no blows. must be a bad fit.

 

[MarcoB]

A cartridge applied silicone based sealant designed for use where a flexible bond is required together with high temperature resistance. This adhesive gives excellent adhesion between most substrates and, because of its high elasticity, is particularly suited for gap-filling applications and jointing materials of different thermal expansion characteristics and where vibration is a problem.

It sounds like it covers just about everything your exhaust is going to do to it lol

 

[caister]

The paste dries out and crumbles away waste of time and money. Get some High temperature silicone sealant from halfords its made by loctite and works a treat as it flexes with exhaust movement.

 

[halla26]

tried the paste on a previous car, sealed round the top but mositure seemed to just cause it to drip off at the bottom, definately go for the silicone if can

 

[tonaz]

tried the paste on a previous car, sealed round the top but mositure seemed to just cause it to drip off at the bottom, definately go for the silicone if can

aye that's what's happening with me. ordered some of this stuff http://www.fluesystems.com/sundries/info/flexseal.htm

hopefully this will sort it.

can i just take the clamps off spread this all over the joins and put the clamps back on?

thanks for everyone's advice

 

[Puressence]

Tig welded mine `cos the ktr decat and magnex exhaust were slightly different sizes where they joined, tried using paste at first but condensation from the exhaust just soften it and made it all loose

 

[Fred@BTM]

^extreme!!!! but i like your style!!

 

[marc1330]

I found high temp loctite copper sealant worked a treat, found it in halfrauds.

 

[Henry]

Loctite 5920

 

[Martin_172]

never needed any paste for my k-tec system, sealed perfectly with standard gasket and never needed any at centre section to backbox joint