I used it on Karystos tiles that had accumulated dirt in certain areas and joints over the years. It doesn't seem to have done anything, whatever it did was done by the water pressure from the pressure washer, the product didn't work. I don't know what kind of stains it can clean. Overall, I wouldn't recommend it if you want it for this kind of use and I wouldn't buy it again. On the positive side, it didn't cause any damage to the joints or tiles.

Very good and powerful machine with a plethora of accessories. It is worth it for anyone to do many tasks very quickly without struggling and without wasting water

For simple cleaning from a little dirt and dust, it is good, but for something tougher, it's a waste of money... just use a regular detergent, it will do the same job with cheaper materials!