Rapid Set 25 lb. NewCrete Concrete Resurfacer is a fast, strong and durable hydraulic cement product. This easy to use product makes old concrete look new. The material has a 30 minute working time, and can be opened to foot traffic in 2-3 hours. Easy to use; just add water Make old concrete look new Concrete gray colour Rapid strength gain 30 minute working time Foot traffic in 2-3 hours