Abstract: A method of repairing cracks in a concrete structure to prevent leakage wherein rods are inserted in the crack at spaced intervals to extend outwardly therefrom. A surface seal is applied to extend partially into the crack near the structure outer surface from which the rods extend, and to the structure outer surface adjacent to the crack and around the rods so that the surface seal acts as a surface barrier for the filler to be injected. Port members, having hollow shaft portions, and a flange portion are placed over the rods with the flange portions approximately adjacent the structure outer surface. Substantially the entire flange portion is embedded in the surface seal. The surface seal is allowed to cure to define a surface barrier for the filler, and the rods are removed from the crack and port members such that the ports communicate with the crack cavity behind the surface seal.