Removed rust from the floor. It does what it promises. You need to be careful with how long you leave it to act so it doesn't cause corrosion.

I don't know if there is anything stronger, but if you follow the instructions it does what it says. The only negative is the small quantity; to clean one item, you might need the whole bottle.

I'm coming back because I bought a second bottle, and it's actually even better. You can soak a soft sponge and gently rub the rust on the surface you want—it's incredibly effective. I tried it on a bathtub and marble and I'm thrilled! Especially for the bathtub, I thought it was ruined... I had tried everything!

Perfect for rust. It has saved me. No need to wash the fabric afterwards, you just pour it over the rust

Unbelievable. The area here had 20 spots of rust from the legs of a metal grill. It removed them all completely. You just take a stiff brush and scrub for a little while.

Tested on floors and tiles…
Corrodes very easily and leaves stains.
Don't even think about it, unless you live in concrete or quarries

I didn't have high expectations, but it exceeded them and more... You can see in the photos how it cleaned the balcony marble from rust caused by a gas bottle. I highly recommend it and I will also get one for future use.!!

Removed rust from the stainless steel sink and tiles. CAUTION, on both surfaces it should not be left for too long as it will corrode them.

The best thing I have found for removing rust from towels and sheets. It does require some scrubbing to come off

Very effective on kitchen tiles and countertops! Unfortunately, it only reduced the intensity of the rust on fabric (canvas), but it was old rust that had already been soaked since the fabric had already been washed. Anyway, I will buy it again, it removed stains on tiles and kitchen countertops that didn't go away with any other product.

I have been using it for decades and it is very effective. It truly removes stains from rust.