Exhaust fitting paste

[Louis]

I'm getting some exhaust gas escaping from the sleeved joints on my milltek system. I'm going to buy some new mikalor clamps from milltek and then apply some exhaust paste.

I've used this stuff in the past - https://www.ebay.co.uk/itm/K2-Silic...725906&hash=item2d0c83237b:g:2J8AAOSw7ANezLjy

Just wasn't sure if there was something better people would recommend? It's now blowing much, but it's definitely leaking. There was nothing used on the joints during initial fitment.

 

[Krarl]

Mastic

Loads of it

 

[JamesBryan]

I've used some on mine and also with mikalor clamps and it still leaks 😔

 

[Louis]

I've used some on mine and also with mikalor clamps and it still leaks 😔

Yeah nightmare! Doesnt blow anywhere else just these sleeved sections.

Should have had the whole lot vbanded 😂

 

[mossyv6]

Don’t use paste mate.

Use RTV sealant.

 

[Louis]

Don’t use paste mate.

Use RTV sealant.

That's what I used before mate, i know to avoid the rock hard pastes like that putty. Just after specific brands people have used really that's decent stuff.

 

[frayz]

Loctite 5910 or 5900 RTV. High temp and remains flexible.

 

[Ex-User (122697)]

Bump - is this still the solution, sealant and good clamps? Mine leaks from every joint!

 

[R3k1355]

I used stove/flue silicone, worked a treat.

Heat-Resistant Sealants | Sealants & Silicone Tools | Screwfix

Buy Heat Resistant Sealant at Screwfix.com. Help to prevent the spread of fire, smoke & gasses. A range for fire resistance. 30 day money back guarantee.

www.screwfix.com

 

[Robbie Corbett]

I used silicon on the front swivel joint (standard cat) and its been spot on - no leaks at all.

Did quite a bit of googling at the time and this stuff got lots of very good reviews, must be decent as the temperature will be pretty high at the cat

https://www.amazon.co.uk/dp/B0002UEN1A/?tag=cliospnet01-21

Would imagine the stove stuff is good too.

 

[Robbie Corbett]

Sorry this is the stuff I actually used:

Permatex® Ultra Copper® Maximum Temperature RTV Silicone Gasket Maker

OEM specified. For high operating temperatures common in 4-cylinder, turbocharged or high-performance engines. The most advanced, high temp RTV silicone gasket available. Sensor-safe, low odor, noncorrosive. Superior adhesion. Three times more oil resistant than conventional silicones; eight...

www.permatex.com

It was the highest temp stuff with good reviews that I could find. Does 150degs more than 5900. Loctite 5990 which you can buy from halfords is 350deg C.

However if its a slip joint, further back from the cat I would likely use 5900.

 

[PhillipM]

I use copper filled silicon too, apart from in front of cats/lambdas (it poisons them)

 

[Robbie Corbett]

I use copper filled silicon too, apart from in front of cats/lambdas (it poisons them)

From what I know its fine when cured and on the outside of the joint.