Answer:
No way. No matter what kind of waterproof material, it is best to apply it directly to the structure; if applied to the tiles, since the tiles themselves do not have any pores, the waterproof material will not adhere properly, resulting in subsequent problems such as peeling and swelling within six months. This will lead to a loss of waterproof function. Therefore, repairing leaks in terraces and balconies still requires removing the tiles and primer from the surface, and applying the waterproof material again thoroughly to achieve a lasting solution.