The photographs show the tiles, half of which have been treated with oil/water-repellent liquid with wet-effect Antique Marble. No other product whatever has been applied on the other half of the tiles; however, the same results in looks can also be obtained by treating the surface with Keos 928 (even outside), neutral-effect oil/water-repellent anti-stain primer.
These products must be applied on the finished floor, and it is all-important for the floor to be perfectly clean and dry. Regarding the intended use, the abovementioned products can be applied again even after several years, in order to keep it in good condition. Furthermore, they are very easy to apply.
For daily cleaning and upkeep, we recommend using neutral detergent Detergon R3.