paint system for concrete

[anon]

I have newly (well a year ago) cast sills in concrete I now wish to paint white. The rest of the house has white gloss painted sills. What system of paints and preparation do you recommend?

I have used International door step paint before which was excellent but a bit pricey and I'll need quite a bit. It seemed quite thin and soaked more into the concrete giving a feel that the interface was more secure. I've got others to put top coats on, I guess it is a case of rub down and apply the same top coat you recommend.

[Vortex]

How about Garage floor paint for the first coat? That'll do it.

[Stuart Noble]

Door steps and garages are both subject to heavy traffic. Unless you plan walking up and down on your sills, standard masonry paint should be fine.

[anon]

How does it stand up to cleaning? My rendered walls don't need cleaning, but the sills do, they go green!!