concrete sill

I have this decorative sill with a crack down the middle. It's a newish house so I assume it's made from coloured concrete or similar. I'm unsure what product to use to fill it to stop water ingress. I might repaint the sill with Sandtex masonry paint in the future but for now I'd just like to...

Hello, I would really appreciate any advice. I want to finish off this patio door installation properly (the builder has fecked off and won’t return my calls). The door has been installed on top of the internal timber frame. There is then a cavity, and a single brick foundation with concrete...