Asbestos type gasket type material?

[Nicholas123]

I am re-siting my cabin heater & re-doing the flu position & that means re-bedding the cowl so need to make some new gaskets.
I have heard reference to neoprene being used in this position but am not sure of it's veracity.
I actually have some strange sort of rubber type sheet given to me by a friend who worked for an aviation company but hav'nt got the foggiest what it really is (I might carry out some tests to see how heat resistant it is) but in the meanwhile I wondered if someone knows of a modern day substitute to asbestos available on ebay?

 

[duncan99210]

Put exhaust wrap into the eBay search and it comes up with no end of tapes to do the job.

 

[Nicholas123]

Put exhaust wrap into the eBay search and it comes up with no end of tapes to do the job.

I'm not sure what an exhaust wrap is but it dos'nt sound appropriate.What I need is something to do what a gasket does,seal the cowl from water ingress & transfer of heat to the backing pad made of teak.

 

[kolster]

Silicone rubber sheet is good for perhaps 200-250 degrees C, depending on what size and thickness you need you may be able to buy something from a kitchen shop and cut it out, it's used quite a bit for baking mats etc in ovens.

 

[Sandyman]

Fire Cement ??

 

[Nicholas123]

Silicone rubber sheet is good for perhaps 200-250 degrees C, depending on what size and thickness you need you may be able to buy something from a kitchen shop and cut it out, it's used quite a bit for baking mats etc in ovens.

That's worth knowing thanks.I suppose really I need to know how hot the flu end fitting/cowl gets really :ambivalence:

Just exposed my rubber mat to the grill while cooking my lunch & it got pretty hot & surprisingly retained the heat for a long time.Did'nt actually catch fire so I expect I'll end up using it

 

[Nicholas123]

Fire Cement ??

Not flexible enough to retain a seal between the cowl & the deck fitting/deck I should think but thanks for the suggestion.

 

[savageseadog]

High temperature silicon sealer made for flues and stoves, in a tube for a cartridge gun, about £6-10

 

[lw395]

Plenty on ebay.
high temp RTV is an option.
Graphite based sheet another.

 

[Nicholas123]

I looked up that RTV stuff last night on ebay & as I can buy a tube for less than 3 quid that will hopefully do the job though I am a little bit concerned about the temperature it covers.
Anybody know the temperature of the heating cowl at the end of a 1 meter long flu connected to a Force Ten Cozy Cabin Heater going at full bore on a cold & frosty night while I am curled up nice & cosy with a lovely bird aboard my own boat in a romantic setting? Well one can dream can't one.

 

[ex-Gladys]

Probably less than you think... Some RTV's do up to (as I recall) 600 C, and you want the heat to be shoved into the cabin not up the flue...

 

[Nicholas123]

Probably less than you think... Some RTV's do up to (as I recall) 600 C, and you want the heat to be shoved into the cabin not up the flue...

The stuff in a tube I've been looking at talks about 250/300 C for short spells & I have got my doubts.I hav'nt really got the foggiest about the actual reading at the cowl in degrees c but I should think it gets bloody hot......you might want the heat in the cabin not up the flu but that's where I reckon most of it goes,I am dithering.

 

[duncan99210]

Thinking this through again, the OP seems to want a sheet of relatively thin heat resistant material to act as a gasket. Searching for exhaust gasket material on eBay produces lots of different sheets, some metallic, others an asbestos like susbstance, which might do the job.

 

[Nicholas123]

Thinking this through again, the OP seems to want a sheet of relatively thin heat resistant material to act as a gasket. Searching for exhaust gasket material on eBay produces lots of different sheets, some metallic, others an asbestos like susbstance, which might do the job.

I've checked them out also & I'm not convinced that they would be water tight in a joint between stainless steel & teak (the metal ones).There is some stuff that the seller says is suitable for steam engines that looks promising but like everything I would end up buying more than I need.

I've ordered some nice stainless steel pipe for the flu & some gas pipe to go with the install & for now am getting on making the backing pads etc.( I have also redesigned the whole cooking area) & am gimballing my Seppleflicke.Lots to do for now :encouragement:

 

[chrishscorp]

I see you are in the Solent region, take a trip to David Covers builders merchants, they sell 2 types of gunk in a cartridge for sealing up flues on stoves fireplaces etc, i used one last week rated at 1500C i think it was about £6.50 or thereabouts, the other tube was a lower temperature but i think may give a slightly more flexible/waterproof type seal, I dont recollect, that wasnt an option i was looking for

The other option you have is fireproof rope (non asbestos) sold in any decent plumbers merchants, used all the time, not expensive.

 

[savageseadog]

I see you are in the Solent region, take a trip to David Covers builders merchants, they sell 2 types of gunk in a cartridge for sealing up flues on stoves fireplaces etc, i used one last week rated at 1500C i think it was about £6.50 or thereabouts, the other tube was a lower temperature but i think may give a slightly more flexible/waterproof type seal, I dont recollect, that wasnt an option i was looking for

The other option you have is fireproof rope (non asbestos) sold in any decent plumbers merchants, used all the time, not expensive.

What I suggested. Use glass fibre rope, line the deck exit with a section of stainless pipe put the rope in the gap and seal with High temp silicone. If the OP uses setting sealers it will probably crack with movement.