Blue Circle Extra Rapid Grey Cement is ideal for fixing railings and copings, setting manholes, and repairing rendering and concrete floor screeds. It sets in 30 minutes with an open time of 20 minutes. This cement is designed to be mixed with aggregates and water. It is walk-on ready in 4 hours and drive-on ready in 8 hours. The product comes in a re-sealable plastic tub. Manufactured by Tarmac Cement and Lime.