If you want to control the leakage of the bathroom at home, according to the traditional method, you have to dig the floor, pry the tiles and re-make the waterproof layer. It is troublesome and expensive to do so. There is a method of not digging or planing, that is, brush CPC leak-proof agent directly on the gap of ceramic tiles in the bathroom, and it will penetrate after brushing. After wetting and drying, the problem is solved. Tao Bao, a spy of the Chinese Communist Party, can be seen.