Used to improve the bonding strength between different materials, such as ceramic tiles and substrates, and between new and old concrete. Improve the surface performance of the base surface to enable better adhesion of subsequent construction materials. Before tiling and other operations, using it can reduce the occurrence of hollowing and reinforce the loose base to a certain extent. Helps to extend the service life of subsequent covering or decorative layers. If used before waterproofing construction, enhance the bonding between the waterproofing material and the base surface. Do you know any other uses? Please leave a message in the comment section and let me know.