Many thanks jobandknock and foxhole for your replies. I've bought some Ronseal hardener and 2-part filler, and will have a go at filling the sill this weekend.
Kind regards.
HI all,
I've just moved into a victorian terraced house where I wish to retain the original original sash windows. A couple of windows had quite a bit of wet rot on the surface of the sill which I need to address. ON one of these, I've stripped back the paint and scraped out the majority of...