Terracotta Tiles cleaned With Tile Doctor Pro-clean and 2 Black Buffing pads, there were some awkward stains in corners and such so I used Remove and Go and some Nano-scrub cleaner on these, but only after they had been pre-wetted first otherwise Remove and Go is hard to get out of the clay.
Terracotta Floor Before Cleaning and Sealing
Lots of Rinsing with water, left to dry overnight and came back the next day to Seal, turned the heating up, opened a couple of small windows front and back to allow for some Airflow and then started to apply 9 coats of Seal and Go with a Paint pad, this took all day, so quite a bit of waiting around, good time to catch up on my paperwork in the van in between sealer drying times.
Terracotta Floor After Cleaning and Sealing
Source: Cleaning and Sealing Terracotta Tiled Floor