Fireproof filler

[Gary111]

Hi, I could do with filling a space where a lock was in a fire door.
Im planning to cut wood to fit, then using intumescent filler round it.

the filler doesnt seem to harden much though, is there something better ?

Ive noticed fireproof cement , or alternatively fire board.

has anyone got any advice on this please ?

 

[HERTS P&D]

Car filler. P38.

Andy

 

[Gary111]

Car filler. P38.

Andy

Thanks Andy, but isnt that flammable ?

 

[Burnerman]

Car filler is polyester based, so maybe a better alternative could be epoxy putty.
You could deep fill with fireclay cement I guess then skim over the top with the putty - a bit cheaper that way.
John

 

[HERTS P&D]

It would be fine. I take it the door is painted?

Andy