In article ,
Pickles writes:

i have been told to fireproof a rain pipe (as big as soil but grey
)thats in the garage because it runs through the bedroom above the
garage.
can anyone tell me what material i need to use,i guess ill have to box
it in but how????

Presumably it's plastic?
You can get an intumescent collar which goes round the pipe
where it enters the ceiling. When it gets hot, it swells up,
crushes the pipe, and seals the hole in the ceiling (in
theory) making it fireproof.
A good builders merchant will have them.

--
Andrew Gabriel