It helps to know the cleaning and sealing history of the floor, knowing this information can help with cleaning and sealing decisions. In this case however the slate tiled floor had been laid 15 years prior in a house in Sturminster Newton, around the time the house was built and had not been resealed since so that information was long forgotten.
Cleaning the Slate Tiled Floor
After testing I found it had been sealed with a wax based product which could easily be removed with Tile doctor Pro-Clean. I applied the pro-clean and agitated the solution and scrubbed the floor with a rotary scrubber followed up with a good rinse and hot pressure wash to remove any remaining solution.
Sealing the Slate Tiled Floor
After leaving the slate to fully dry for a few days the floor was sealed with Tile Doctor Seal and Go which is a topical sealer as opposed to a penetrating sealer. This low sheen sealer still has a adds a little shine and brings out the colour and darkens the slate tile. Interestingly enough she loved it but her husband hated it which just goes to show you can’t please everyone.
Both the photographs on this page are from the first house, unfortunately I forgot to take a photograph from the second floor to demonstrate the difference but basically it resembles unsealed slate.