Fire Cement/Copper

[Willis West]

Can anyone let me know if fire cement is corrosive to copper? I can not seem to find anything on the tub that indicates this or anywhere on the internet.

 

[ecowarm]

would have thought it is, I think its an alkaline best to ask for coshh sheet or phone manufacturer, why is it in contact with copper?

 

[REDSAW]

are you using it to fill the pipe entry behind a fire?.

 

[Willis West]

It has been used to seal the cored hole where a gas pipe is passing through a cavity wall. The pipe has been protected from the brick and cement with a plastic pipe over it but it is touching the fire cement where it exits the wall.

 

[ecowarm]

I would have thought not good

 

[Best]

I don't think it does much harm to copper, but I wouldn't have it near it. If damp gets to some plaster, sand & cement, it makes the material very corrosive, so may apply to fire cement also.

 

[AWheating]

seal the sleeve to the wall with sand and cement and the seal the pipe to the sleeve with fire rated mastic. If possible change the sleeve to copper unless your sure the plastic pipe used is of a suitable material.

 

[REDSAW]

if in doubt take it out, no good if it does degrade the copper in say 2-3 years when your not there,imo.

where does it state or what is 'suitable sleaving material' in the guidelines?

 

[AWheating]

BS 6891

8.10 Sleeves
8.10.1 Sleeves shall be of a material capable of containing gas, e.g.
copper, steel, polyethylene or polyvinyl chloride (PVC).
8.10.2 Sleeves shall pass through the full width of the wall or the full
thickness of the floor. Sleeves shall not impair the fire resistance of
a building. The annular space between the pipe and the sleeve shall be
sealed at one end to the pipe with a flexible fire resistant compound.
Where a sleeve passes through an exterior wall, the seal shall be on the
inside of the wall.

 

[Dannypipe]

I think its the lime in most aggregates that eat copper. (Much more so when damp).

There is undoubtably lime in any cement, so you don't want this in contact with the copper tube.

 

[BrunaRibeiro]

I always went to a online shop and bought fire clay. Its very cheap. Then mixed it with white cement. And then layed the fire brick.

 

[Dotty]

Not only was it spam, it was Indian spam!

 

[Dannypipe]

Indian spam.....oooooooh spicy.

 

[lame plumber]

I always went to a online shop and bought fire clay. Its very cheap. Then mixed it with white cement. And then layed the fire brick.

I wanted to see part 2 of build your own tandori oven! 🙂

 

[Dotty]

I wanted to see part 2 of build your own tandori oven! 🙂

It would've only ended in tears.......

 

[stevetheplumber]

i use fjc to seal sleeves one tub lasts years the way i work

 

[buckley plumb]

went to buy a tub of the puuty to seal a meter box pipe this wk was shocked merchant wanted nearly £20 is there anywhere cheaper to get it from

 

[Mike Jackson]

went to buy a tub of the puuty to seal a meter box pipe this wk was shocked merchant wanted nearly £20 is there anywhere cheaper to get it from

FJC is £6.20 plus VAT from BES for a kilo tub, item number 9465

 

[buckley plumb]

Toolstation > Plumbing > Consumables > Intumescent Putty

thought it would be cheap here but i was wrong

 

[Dannypipe]

Screwfix sell fire cement in a large tub for about £3.

 

[AWheating]

I wanted to see part 2 of build your own tandori oven! 🙂

my brother has one in his garden, not too hard to build. hardest part is finding the clay pot.