Frank Erskine wrote:

I have a brand new tin of Fluxite, as well as a part-used one.

I think mine has lost its lid and collected all sorts of chaff.

Can you still buy it?

Yes

http://www.pvrdirect.co.uk/productin...Fluxite-FLU100

But I seem to get on better with this stuff for plumbing now
http://www.screwfix.com/prods/32957/...a-Co-Flux-475g