Structural elements such as beams, slabs and columns may require strengthening or repair during their service life period. With aging of the infrastructure and many concrete structures reaching the end of their design life, maintenance and repair is becoming an increasingly important part of the design and construction industry. Different types of repair materials are available in the market and it is usually difficult to choose the best repair material especially when considering the cost of such materials. This paper presents the results of an experimental investigation of patch repair materials on plain concrete prisms as well as on reinforced concrete beams. Three cement-based repair materials available in the market (being different in the mechanical properties) and an ordinary Portland cement (OPC) mix produced in the lab were used in the study. Damage was induced in the prisms/beams and then repaired using different repair materials. The experimental work included flexural strength of damaged/repaired plain concrete prisms, slant shear (bond) strength between the concrete and the repair material, and bond of the repair materials in damaged/repaired reinforced concrete beams loaded to failure. The test results showed that some repair materials performed better than OPC in plain concrete, but no difference in the behavior between the different repair materials in repairing reinforced concrete beams.