Plug the 1st port with the cap provided and move up to the next port, repeating this process until the entire crack has been filled with epoxy or urethane. That is the visual sign that the crack has been filled to that level. Start injecting at the lowest port on the wall plus continue until the epoxy or urethane starts to ooze out of the port above it. The entire exposed crack is covered with the paste, leaving just the port holes uncovered. The paste cures in about 20 to 45 minutes to provide a surface seal with outstanding bond characteristics that holds up under injection pressures. Use an epoxy adhesive (like Rhino Carbon Fiber’s Fast Curing Epoxy) to seal over the surface ports and exposed cracks. A general rule of thumb is to space the ports an inch apart for each inch of wall thickness. The base of the port is placed directly over the crack plus bonded to the surface with an epoxy paste. They eliminate the requirement to drill into the concrete, reducing labor time and cleanup. Surface Ports (short rigid plastic tubes with a flat base) serve as handy entryways for getting the repair material into the crack. Industrial & Commercial Kitchen Solution.
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