In message .com, Vaci
writes
I recently got a plumber to do some work on my cast iron soil pipe. He
used some kind of thick, black, soft, sticky tar to seal the connection
between a 40mm waste pipe and the (slightly larger) boss pipe on the
soil stack.

Can anybody tell me exactly what this tar is, and where I can get some?

When I mated a plastic soil pipe into a socket on my CI soil stack I
used some 'roof and gutter ' sealant that I already had. This was not a
normal silicone type sealant, it was black and a bit more
'rubbery/tarry' maybe. Anyway it worked fine.

not sure where it actually came from, but nowhere special, a local shed
or BM I would guess.

It wasn't this brand, but this sounds like it:

http://www.toolstation.com/search.html?searchstr=11002
--
Chris French, Leeds