This is probably a very unlfgss answer, but I bought this as it's what was in Wickes (which is down the road):
https://www.wickes.co.uk/Sandtex-Microseal-Ultra-Smooth-Weatherproof-Masonry-15-Year-Exterior-Wall-Paint---Pure-Brilliant-White---10L/p/137586
On our porch 2yrs(?) on its fine. On our concrete slab seating area it has chipped from the kids playing with stones.
So my assessment is that it's fine where there won't be foot traffic, but I'm not sure any paint, paint, would hold up to that.
Surprisingly decent paint the Sandtex Masonry. I've got some I use for touching up the top of walls and other small jobs. Lasted ages in the pot and good opacity.
@Airhead started
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This is probably a very unlfgss answer, but I bought this as it's what was in Wickes (which is down the road):
https://www.wickes.co.uk/Sandtex-Microseal-Ultra-Smooth-Weatherproof-Masonry-15-Year-Exterior-Wall-Paint---Pure-Brilliant-White---10L/p/137586
On our porch 2yrs(?) on its fine. On our concrete slab seating area it has chipped from the kids playing with stones.
So my assessment is that it's fine where there won't be foot traffic, but I'm not sure any paint, paint, would hold up to that.