Had a look at some windows a few days ago and they have a soft putty between the wood frame and the double-glaze glass, it’s the stuff you can mark with your nail. In places it’s going very soft, so you can smear it, it’s almost like it’s gotten soggy, the best way I can describe it would be melting chewing gum.
Is there anything I can do to replace it or repair it with?
Is there anything I can do to replace it or repair it with?