Rapid Build RB30 is a rapid-setting and hardening mortar that is ideal for both internal and external repairs. It sets and hardens in minutes, giving a repair of exceptional strength and hardness. The mixed mortar can be walked on after 2-3 hours at 27+/-1 centigrade temperature. It has low sag, making it ideal for vertical or overhead repairs. It is available with integral corrosion inhibitor for maximum corrosion protection. It can be built up to at least 1-1/2 inches (38 mm) in one application. Its unique properties allow the user to sculpt the material during application. It can be used to repair concrete cracks, holes, steps, pre-stressed panels, pipes, tunnels, sewers, loading docks, silos, retaining walls, culverts, catch basins, decorative mouldings, bridge columns, parapet walls, septic tanks, cold storage vaults, and virtually any vertical or overhead concrete surface.