These pictures are of a Sandstone floor installed in a house in Leyland, the dog seems quite content with the floor but the owner wasn’t; the trouble with Sandstone is that is a relatively soft sedimentary stone which doesn’t provide the best foundation for a sealer causing it to breakdown faster. To counteract this I usually apply as much sealer as the floor will accept and then leave any spare with the customer so they can top it up when the shine starts to wear off. I find this works better than to let the Sealer break down as this will allow dirt to get trapped in the stone and then you have to start all over again with the clean and seal. Applying a regular top up of sealer will keep the floor in good condition for several years before it needs to be done again saving the customer time and money in the long run.
Cleaning Sandstone flagged flooring
We cleaned the Sandstone flags with a 1 to 10 dilution of Tile Doctor Pro-Clean and warm water agitated with a Black buffing pad attached to our floor scrubbing machine. The soiled solution was then removed using a wet vacuum and the floor rinsed off with water, judging by the colour of the dirty water it was clear we had managed to dislodge a large amount of dirt. The process was repeated a few times until we were confident the floor was as clean as it could be and then we left it to dry overnight.
Sealing Sandstone floor tile
The next morning the floor had dried and we proceeded to seal the sandstone with Tile Doctor Seal and Go which is highly recommended for this type of stone providing a good level of stain protection combined with a nice low sheen finish. Five coats of Tile Doctor Seal and Go were needed to cover the floor which can take some time to apply as each coat needs to dry first before you can apply the next.
Source: Cleaning and Sealing a Sandstone Tiled Floor in Lancashire