American Hydro Systems 2662 Rid O' Rust Liquid Rust Stain Remover, 1 Gallon, 2 Pack

This stuff works wonders. I never write reviews. But I would buy this 10 times over. It does exactly what it says it will. I learned you just have to leave it on for a while, if you wash it off too early, it might not take it all off.

Works for irrigation well rust stains on concrete where nothing else does.

Only thing that will take well water Rudy stains out of sidewalk. Love this stuff!

Works unbelievable for taking rust off surfaces. Great for concrete. Don’t use on colored brick. Worked on our painted lanai.

This product really works!! It does an amazing job!! I highly recommend it.

Took the 6 yr old rust stains out of our sidewalks, paver blocks, rock beds and driveway no problem!!! I used 4 gallons and it was just enough. We had quite a bit to cover, next year I won't need as much. Great product!!

This product works really well at removing rust off of tile. I pour it on and wait 15 minutes and its gone.

I was amazed at how well this product worked. I used it on our sidewalk to remove rust from our irrigation system and it did a super job. Worked so well that I ordered more and will continue to use it whenever we have a rust problem to deal with.