What filler should I use between a window frame and sill
I have a large double glazed sliding window in my lounge. At the base of this, I have a tiny wooden sill with the main sill beyond. Between the little wooden sill and window, the people who put it in have put a filler and topped it up with sealant.
I am replacing the filler and sealant and cannot think what kind of filler to use.