How to repair the union of the tiles with white cement
Over time, the cement joints that seal the junction of the bathtub or shower tray with the tiles wear down until all the material is lost.
At that point, it is very likely that water leaks towards the neighbors below and to the walls of your home next to the bathroom.
The good news is that it can be fixed simply and cheaply.
There are several products for this, for example we have silicone but it can turn yellow, catch mold and it doesn't usually last long.
On the other hand, we have specific products for this workforce, but they are usually expensive, so I opted for white powdered cement, which is cheap, easy to handle, and also the joints in the bathtub or shower tray will be as new as one of the materials that are used when laying the tiles when building the bathroom.
0:40 Remove the old white cement
1:50 Make the mix with white cement
3:00 Fill the joints with the white powdered cement mixture
3:50 Clean up the excess
4:25 Clean excess from joints
5:20 Final result