Cities love it when you replace their city walk at your expense! Sometimes they pitch in, but every time they make you follow their design specifications! One of which is usually using a true ASTM C-1315 Cure. ROCA 1315 goes on slightly milky white, so you can see that you're getting your coverage, but dries clear. It forms a nice film on top of the fresh concrete, trapping moisture in for slower, better hydration of the cement in your new concrete sidewalk.