What kind of material should be used when all the white cement that fills the gaps in the tiles falls off?

The white cement that fills the gaps between the tiles has all fallen off. What material should be used to fill it in to make it stronger?

My decoration experience: The decoration team really can't look for it! Because my house just laid bricks and painted the walls, I didn't choose the decoration team seriously. As a result, I just did a little work and got the glasses back! At the time, I thought this was nothing. I happened to be busy at work. LG was idle during that time, so I asked him to stare at it. As a result, my vitrified bricks that were not cheap were almost completely destroyed! Almost all the gaps between the bricks are not correct, and I don’t know why, the gaps are of different sizes, and many tiles have broken corners and edges that are very clearly damaged, and the lines are not right, and they are messy! Too annoying! Moreover, the white cement between the gaps between the tiles (I don't know what it is, white cement? Grout?), almost all have fallen off! The big joints in the middle of the tiles are exposed! The broken ones are also revealed! Not to mention too ugly! The key is also difficult to clean, because there are always dirty things falling into the gap!

How to make up for it, is to buy something like white cement to fill it up? Or glue or something? Will it fall again?

Solution: Use white cement to save money, preferably with some glue; jointing agent, the decorative effect is similar to that of white cement; for mid-to-high-end decoration, you can consider using beauty jointing agent, which has good decorative effect, is practical, waterproof, and can be used. Clean, the brick joints will not turn black. After the use of the beautiful joint agent factory, the beautiful joint agent can completely solve the problem of dirty, black, yellow and moldy tile joints. The product covers the surface of the tile joints to form a smooth and porcelain protective film, which is wear-resistant, high-strength, waterproof, oil-proof, It does not stain, it is easy to clean, and it is bright after polishing. In addition, the beauty seam agent factory has rich colors, which can meet the needs of customers.