MegaSack DRAW - This year's winner is user - rgwb
We will be in touch
Just noticed that one of our window sills has a crack in it. Victorian terrace, concrete/ stone/ mortar sill (its solid and painted so no idea of the composition). Looks like a gutter has been overflowing onto one location and damaged it as it’s just in the middle of a sill so no other obvious cause. What’s best for filling it? It’s only small 5 cam or so and doesn’t look to deep.
I used this Toupret Fibacryl Flexible Filler on some small cracks in my render and it has held up well. It's just a filler so won't "fix" the problem but you can over paint it and it'll keep the water out and be good unless the crack is still opening.
I would use an external masonry filler eg
https://www.screwfix.com/p/toupret-touprelith-f-exterior-masonry-repair-filler-1-5kg/7626h
Victorian sills are normally stone AIUI (or at least all our street's are).