The before picture below was actually taken after another cleaning company had come in to clean these Terracotta floor tiles for a client in the city of Oxford; well what can I say except they then called Tile Doctor.
Cleaning Terracotta Tile
I started by doing a test on a small area and realised that I could strip the remaining sealer from the floor with a strong dilution of Tile Doctor Pro Clean which is also an effective cleaner and safe to use on stone and tiled floors. So I diluted Pro Clean with warm water and spread this on the floor leaving it to dwell for twenty minutes before scrubbing it in with a black padf fitted to my Rocky floor machine. This worked very well on the floor and the cleaning solution was soon dirty with the released soil which was removed using a wet vacuum and more water to rinse it away and dry the floor as much as possible.
Sealing Terracotta Tile
Satisfied that the floor was now as clean as it could be I left for the day and returned the next day to seal the floor, first checking that the tiles were dry and ready to be sealed.
Sealing was done in two stages starting with an initial coat of Tile Doctor Colour Grow which is an impregnating sealer that adds life to the natural colours in the tiles and gives the floor a good base for the next sealer. The second stage was to apply a few coats of Tile Doctor Seal & Go which builds up a surface seal that leaves a nice sheen to the floor as requested by the customer.
Source: Professional Tile, Stone and Grout maintenance service in Oxfordshire