Smoke box sealing material?

[Derek DroverParticipant @derekdrover32802]

Hi all.

I'm curious to know what people use to seal their smokeboxes? I'm having a little difficulty with my Simplex, the holes at the bottom of the smokebox where the pipes pass through. I did use "fireclay", courtesy of Screwfix.. I have a ruddy great tub of the stuff of which I only used a "smear"… but after a number of runs its become brittle, cracked up and has now all disappeared (probably up the hoover!) Has anyone else used such stuff… do I need to use it heavily and thick???? or is there an alternative which has some degree of flex??

Cheers… Del.

[Derek DroverParticipant @derekdrover32802]

Simplex smokebox

[FMESParticipant @fmes]

Hi Del,

Car exhaust jointing compound works well.

This sort of thing **LINK**

[John BaguleyParticipant @johnbaguley78655]

Many people use ordinary silicon sealer. It seems to stand up ok. There are high temperature versions if your concerned about using the ordinary stuff.

John

[Halton TankParticipant @haltontank]

I use Bosswhite and contrary to what people think it is still available.

[stan pearson 1Participant @stanpearson1]

Hi Derek

Yes the best thing to use is silicon sealer what is used for sealing windows it has to be heat resistant and fire proof to comply with building regs

Regards

Stan

[julian atkinsParticipant @julianatkins58923]

hi derek,

i wont rely on fireclay etc.

instead i make the holes for the steam pipe and exhaust/blastpipe a close fit, thread same all the way down and fit curved washers and threaded nuts to cover any gaps. there is then no possibility of sealant or fireclay to really as a sealant. instead a mechanical fixing being preferred.

it is always possible to add an extra plate on the bottom of the smokebox to achieve the above.

cheers,

julian

[lee hawkins 1Participant @leehawkins1]

When I was building a Kiln, I got stuff from this company , they do everything http://www.vitcas.com/

lee

[Derek DroverParticipant @derekdrover32802]

Well, seeing as I have a tub, I've used Bosswhite.. got in a right mess cleaning out the smokebox beforehand though… good job I didn't have my Sunday Best shirt on !!!!!!!!!!!!!!!!!!!!!! Will see how it takes in 48 hrs or so.

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