Sealing eberspacher heater exhaust

[jakew009]

What’s the best sealant to use on the exhaust fittings? Is a setting car exhaust paste ok?

 

[Malabarista]

Hi
I am not an expert but it is what I used and I am still alive. Give it loads.

 

[LittleSister]

What’s the best sealant to use on the exhaust fittings? Is a setting car exhaust paste ok?

I am no expert but would think something that retains some flexibility and is actually described as sealant would be better than something that presumably sets and might be more suitable for repairing (with exhaust bandage?) holes etc.

I am in the process of installing a new Eber type heater in a boat. The commendably full instructions (which relate to installation on both boats and inside vehicles) advise using exhaust 'sealant' on the joints in the exhaust system.

I went to a car spares/accessories shop, and found that they had both exhaust 'sealant' and 'repair paste' (both the same brand and similar prices). I assume that while 'repair paste' might do, 'sealant' is the more appropriate for what I need.

 

[jakew009]

Just ordered some of this, seems good for up to 343 celcius continuous and 399 intermittent. Doubt the exhaust gets that hot.

Permatex Optimum Red

https://www.permatex.com/wp-content/uploads/tds/81630.pdf

 

[Boater Sam]

Envirograf Silicone Good to 1200 degrees C. Will seal the flues on fires and boilers etc.

 

[jakew009]

Envirograf Silicone Good to 1200 degrees C. Will seal the flues on fires and boilers etc.

It's interesting how they claim 1200 degrees yet other manufactures are much less. I'm guessing the test method has a lot to do with it.

 

[[70521]]

Envirograf Silicone Good to 1200 degrees C. Will seal the flues on fires and boilers etc.

Hard to think what could get that hot and need a flue on a boat.

Suggestions please on a post card to the editorial office.

 

[Boater Sam]

Too much shooting of the messenger I feel..........................................................................
I don't make the stuff.
I make nothing from the company.
It does what it says on the tube.
It works on the top of a Squirrel stove.
Other high temperature silicones are available.

 

[[70521]]

Too much shooting of the messenger I feel..........................................................................
I don't make the stuff.
I make nothing from the company.
It does what it says on the tube.
It works on the top of a Squirrel stove.
Other high temperature silicones are available.

It was a general comment based on something you had written. Not a shot at the messenger.

We all learn by what people post on here and i was puzzled at what on a boat would produce such high tempratures. Its the questioning engineer in me. Hence the comment on answers on a postcard. Perhaps PBO could do an artical on the subject.