Seismic strengthening of masonry structures through repointing has been recognized as an efficient and low-cost technique for increasing structural stability, particularly in regions of high seismic activity. This paper shows the results from the research program that involved laboratory tests of the mechanical properties of masonry. The objective of the research was to evaluate the effectiveness of repointing as a method of strengthening existing structures, providing greater resistance to compression and dynamic loads.

The results show that repointing, particularly when advanced materials are used, considerably increases the compressive strength of masonry structures as well as their ability to sustain seismic forces. Additionally, the method contributes to the improvement of their long-term stability, which makes it applicable to a wide spectrum of structures.   The economic analysis of the application of repointing shows that this approach is not only effective but also financially viable which makes it a practical choice in civil engineering, being able to provide a considerable contribution to the seismic safety of structures.