Perform the final finish on the concrete, then allow it to cure until you can walk on it without leaving an imprint. This should take an hour or so; depending on the climate. Concrete will cure faster in hotter and dryer conditions.
Spray the concrete with the hose. Apply a light spray over the entire surface. Let the water dry and repeat. Spray the concrete repeatedly over a period of several days to slow the curing process.
Cover the wet concrete slab with a sheet of plastic. This will help hold the moisture in the concrete.
Put a concrete curing agent in a sprayer. Mix according to the manufacturers instructions. Spray the curing agent on the concrete. The curing agent seals the concrete to hold in the moisture.