Sealant or Repellent for new bathroom floor?

I just had my bathroom floorboards and tiles replaced for the third time in my apartment. Is there a sealant or repellent that I can apply to the newly tiled floor to stop any damage from the water?Sealant or Repellent for new bathroom floor?
It sounds like you have an improper installation problem. if the tiles are coming loose, then the sub floor is not solid and secure or your sub liner is incorrect, could be the adhesive is wrong or incorrectly applied. a tile floor is idea for wet areas when installed correctly. Temperature plays a big roll also. cold floor and hot moist air changing to warm dry air over and over will tell you if the job was done right the first time. The tiles loosen and crack.Sealant or Repellent for new bathroom floor?
First, where is all the water coming from? Second, the backer board under ceramic tile is supposed to be waterproof pretty much. There is a sealer for tile sold at lowes, but it is mostly for stain repellent. I do not know about the water side of it.