Cleaning Victorian Tiles
I used a concentrated dilution of Tile Doctor Pro-Clean to clean and strip the old sealer from the floor. It was first left to soak into the tiles for around 15 minutes before being scrubbed into the Victorian tile and grout using a slow speed rotary machine fitted with a scrubbing pad. The dirty solution was removed and the process repeated and grout lines scrubbed until I was happy the tiles were clean; this was then followed with a thorough rinse with water and a wet vacuum was used to remove the fluids and get the tile and grout as dry as possible. This process took most of the day so once the floor was clean I left for the day leaving it to dry overnight.Sealing Victorian floor tiles
I came back the next day and after confirming the tiles had dried I began sealing them using six coats of Tile Doctor Seal and Go sealer which will provide stain protection as well as adding a nice shine to the floor. The interesting thing about Seal and Go is that’s it’s a water based sealer so you don’t get a smell as it dries.Source: Help maintaining Tile, Stone and Grout