Do not water your concrete decking until 24 hours has passed from initial application. It is recommended that you water your concrete decking at least twice daily. During the warmer months, three times minimum is best. You cannot put too much water on new concrete decking, so feel free to water away. It takes 30 days approximately for the concrete decking to cure, so you cannot hurt it by watering it for the full 30 days. The recommendation is that you at least do it for two weeks post application.