I have old steel frame windows at the front of my brick house and all of the substance that is I assume supposed to be holding the window glass in and finishing it off cosmetically is all crumbling and needs to be replaced.
I have no idea what product to use and how to do it. Can anyone please assist? Obviously it will also need a bit of a clean to get rid of mould etc as you can see from the photo below... And yeah, then we need to get onto repainting the windows, too.
Hi @Shane - that looks like a traditional window linseed oil based putty. Selleys make a version (called Special Putty), here’s a link
Looking at this, it doesn’t mention steel windows, so you may want to do a bit more research. All the older steel windows I’ve seen have used traditional window putty. Someone else might be able to offer more certainty.
Fairly sure you need to paint linseed putty with an oil based product. I’m not sure if using modern products such as silicon is appropriate - there again some research might help.
Mould and stuff can be cleaned off with a mould remover. Hope this gets you started, cheers Deb
Hi @Shane. Many thanks for your question, I'd be happy to recommend how to repair the window putty.
As Deb (@Mathy) has mentioned, that material is likely to be a linseed based putty traditionally used around window glazing.
If you remove all the damaged portions by carefully prying it away with a flat head screwdriver or chisel, you can then apply new putty. Special Putty is not like wood filler, it is sticky and takes a certain amount of technique to get a great finish. I would instead recommend replacing it with Sikaflex 11fc Polyurethane Sealant which you can caulk into the corner. It will give you a much neater finish and is more time-efficient. Make sure to clean out any residual putty that might be left on the glass or frame before applying the Sika product.
If you would like further information about the products or had other questions, please let me know.
Great, thanks for all. Will let you know how I go with it. Certainly favour the easier to use option. Getting rid of the existing putty is not a problem, it is all crumbling off itself. But not sure what product to use to clean up the general grime and mould. Any thoughts @MitchellMc?
I'd recommend some Glitz Spray On Wipe Off and a stiff bristle scrubbing brush. Anything that isn't removed with the cleaning fluid, I would lightly sand back with 180 grit sandpaper. If you think the mould is a returning issue, treat with Selleys Rapid Mould Killer.
I hope that assists you. If you have any further questions, don't hesitate to ask.