Saltillo tile is one of the very most porous tiles, it is not sealed or glazed when you get it to install. If done properly the tile should be soaked and sealed prior before installation and grouting. Unfortunately a lot of flooring contractor only lightly seal the top surface and not the whole tile. While this may help with the install it will eventually lead to staining of your expensive tile floor.
It is very important to have your Saltillo clean and sealed regularly to avoid stains. DFW Steam Cleaning has clean many natural floors and we know how to do the job correctly. Call us and will make sure your Saltillo flooring last for many years.