If the leak occurs due to the long life of the hot bathtub and small cracks occur, the first way to find the leak is to fill the ceramic tub until it is full. Make sure the source of the leak is only to the limit of the wall or bottom of the bath. The trick is to look at the maximum threshold for the water to recede when it is fully filled. If there are no leftovers, it is certain that the leak is at the bottom of the hot tub. But if there is still some left, even if it’s only 0.5 cm, then the leak is in the wall of the hot tub. Try to feel for the location of the bath leak, focusing on the inside of the sink. Usually, there is a loose grout (layer between) the tiles or a slightly collapsed ceramic surface. From here it can be found where the leak is when you check all of your hot tubs.
Then, you need to make a hole in the hot tub to make it easier to repair. Why did you even make a hole? This is done when the leakage point in the hot bath tub is too small. The hole should be made a little wide, so that the filling process can be better. Making this hole can also tidy up the leakage cracks in the hot tub so that when patching, the patch will look neater. Use a cutter (cutter) or other sharp object to widen the leak point. Make it carefully and just enough.
If you have only minor cracks, patching is an easy and inexpensive solution. Simply prepare gray cement, glue like fox or silicone glue for the aquarium and small objects such as broom sticks as well as waterproof liquid. Take gray cement and mix it with glue or just take aquarium silicone glue, then paste it on the cracked part. Use a broom stick to glue the cracks in place.
Furthermore, things that cause the grout to peel is that the grout holes have become brittle and then left for a long time, eventually causing damage to the bottom of the ceramic. The good thing is, you remove the tiles around the grout then clean the walls.