Black cement and white cement can not be mixed, if the concrete floor structure itself is not good to do with the cement alone waterproof, the waterproof effect is poor.The waterproofing of the toilet can be made of cement-based polymer waterproof coating, that is, in the cement-based polymer waterproof coating by adding the right amount of cement stir evenly brushing the concrete surface in the floor, forming a layer of waterproof protective coating to prevent water leakage