Concrete Quick Set or C.Q.S. Concrete Patch Compound is a Portland cement based formula that is formulated for making structural repairs to vertical and overhead surfaces. It can be used anywhere that rapid setting is necessary. Sets in approximately 10 minutes. Its unique properties allow the user to actually sculpt the material as it begins to harden. Quick setting cement is used to repair: Concrete pipes, sewers & culverts Floors, steps & curbs, Bridges and pavement, Cold storage vaults & freezers, Pre-stress panels, Loading docks & tunnels, Retaining walls,Catch basins & septic tanks.