Hello Cailean,
I have often used `PC4` Cold Caulking Compound - not on full Stacks but where I just had a couple of joints - for example where I was installing a 6ft length of Cast Iron pipe and an Access pipe at the bottom of a Plastic Soil or Rainwater Stack.
This would have been in either narrow access paths between Buildings or where a narrow access road for vehicles - some which had no pavement adjacent the bottom of the Stack - the Cast Iron section being more robust than Plastic.
Rather than bring the `Full Lead Melting & Pouring Kit` for just 2 joints I would use `PC4` at the connections to the Access pipe and the Cast to Plastic Cast Iron Adapter.
When I first used it many Years ago [40+] I wonder if it was `Asbestos Free` then ?
You are right about the Plumbing `Traditional Skills` not being taught at Colleges and the fact that there are plenty of Buildings where Cast Iron Stacks and Roofing Leadwork etc. still exist and need Plumbers capable of working skilfully on them.
I remember many years ago when `Nuralite` was first brought to market as a cheaper alternative to Lead for Flat Roofing, Flashings, Capping Brickwork, Structural Concrete etc.
It was stated that `Any Plumber could fit the product using their existing Leadwork skills and Tools`.
While the Roofing sheet was a flexible membrane type of material the `Board` was as the word suggests - `as stiff as a board` and not at all easy to work with regarding `Folding & Creasing` plus sticking it down in the case of Cappings and Flashings - FAR from `just as easy as working with Lead` !
I only worked with it on one Site where I was Capping parapet walls and installing Flashings - using Nuralite for the Capping on that Site was ridiculous as Capping stones would have been far more effective for `Weathering` and much better looking.
I hated working with it as the Black `Tar like` Adhesive was almost impossible to get off your hands and clothes and there were no `Surgical` / Latex gloves readily available to buy in those days - because of precise bending of the Nuralite sheet material `Rigger gloves` or similar could not be worn regarding your hands dexterity.
The Adhesive really did damage your hands because it got well `ground in` as did the attempts to clean it off using Diesel !
`The Good Old Days` ?
EDIT: I just looked for `Nuralite UK` online and found that the Company had ceased trading in 1998 - that was probably about 18 years after I had used it as described above.
Having used it I would not have been surprised to find that the Nuralite Board did not catch on in the UK to `replace Lead for Flashings etc.` - but I am surprised to find that Nuralite products are very well used in the New Zealand Construction / Roofing Industry and probably Australia.
Chris