It is a very powerful stain remover for marble/tiles and also for rust compared to common cleaners and ideal for tough and stubborn stains! Personally, I used it exactly as stated on the packaging, simply rubbing the stubborn stains on the tile surfaces with a bathroom sponge. I let it sit for a while to take effect and the result was amazing! I also used it on the lid of the drain trap that had caught rust, which shined within a few minutes. I really didn't expect these stubborn stains to be removed so easily. I am very satisfied with this product, so I will buy it again as I need it for other tiles with stubborn stains. I highly recommend it because it is also an excellent Greek product.

It does nothing... I'm starting to believe that I haven't received what the others who saw results did... and when I say nothing, I mean the things it claims to do, like rust, stains, mold...

It is not suitable for marbles that have dirt that has penetrated into the marble. It does not remove dirt from pots as it appears on the outside.
I tried it for the second time on the same marbles and the result is the same and probably worse than before. It also requires rinsing with a sponge and water. If you don't rinse it with a sponge, it leaves marks...

I used it on an old marble sink.
The sink was honestly in very bad condition.
I applied a relatively small amount, rubbed it a little, and let it sit for about 12 hours.
You can't imagine the difference. I repeated it one more time and it became almost white.
VERY good product

Very good product, it does what it promises. I used it on a bedroom mosaic floor that had developed mold after years of being covered under laminate. It needed an effective solution, so this product "broke down" the mold and other stains in just 1 minute. I recommend it for similar cases, just make sure to wear gloves, a mask, protective glasses, and have good ventilation. As it foams, it has fumes and an extremely strong smell!!! If you're not sure if you can apply it, seek help from a professional or specialist. The mosaic did slightly lose its shine (which doesn't really bother me since it's very old), but I have also purchased the corresponding D25 to restore some of the glossiness. It would be wise to test it in an inconspicuous area to avoid unpleasant developments/corrosion, etc.

Excellent product. It cleans the dirt with just a little scrubbing and for super results, once it dries, it needs a pass with D 25 to maintain cleanliness.

Although I bought it for the marbles, I also used it on the tiles and it effectively removed rust and black stains.