leaded window 'cement'

[c r]

Hi All

Ive been doing a bit of research on leaded windows, and particularly on the 'lead cement' which is used in between the very small gap between panes of glass and the lead strips('cames'), which stiffens window, adding strength and helping keep it watertight. My leaded windows, about 100 years old could do with having these very small fillets of 'lead cement' done again, which I intend to do myself. The proper way is to do it flat, on a workbench. Well, thats out of the question for me, I have to do them in situ.

Based on what I've read I'm thinking I could make up a mixture- basically similar to glazing putty- something like

50% raw linseed oil
50% boiled linseed oil
whiting
black oxide pigment

and carefully 'putty' it in.

I wonder has anyone ever done this, general experience? Is there another ingredient for the mix that would add durability?

Thanks a lot

 

[DJH]

From memory. when I was young e always called this cement graphite for some reason. I don't have any left now I'm afraid. I have some acid here that we used to darken any new lead came we had used and it also had the same effect on the soldered joints.

We used to have a mould for casting came and a mill with different profile rollers on it so we could match the existing came. It disappeared shortly after my step fathers death. If anyone has got it please let me know.

Doug

 

[Me!]

I have tried what you suggest, but using commercially available leaded light cement.
It does improve things, but I've not been able to completely stop the window leaking.
On hinged casements I've unscrewed the hinges so I can work with it flat on a bench, and that worked much better.

 

[88v8]

Dependng how sound the cement is on an existing window, this will/may stop leaks.
http://compare.ebay.co.uk/like/350239211192?var=lv&ltyp=AllFixedPriceItemTypes&var=sbar&adtype=pla&crdt=0
Apply repeatedly to the cement line, inside and out.
Worked for me.

Ivor