Iron OUT Liquid Rust Stain Remover, Pre-mixed, Quickly Removes Rust Stains from Concrete, Vinyl and Other Outdoor Surfaces, No Scrubbing, Safe to Use, 1 Gallon, 4 Pack

I am not one for writing reviews but I had to for this product. I had tried many things before this to remove hard water stains from my vinyl siding and garage doors. The way that some of my sprinklers in my irrigation system were pointed had them spraying the house. I've since modified them but the hard water stains remained. I tried vinegar, bleach, and other products. None of them worked. I found this on amazon and thought I'd try this. So glad I did. place a gallon in a pressure sprayer and applied. Waited five minutes and rinsed. Hard water stains came right off. Can't praise this product enough. So easy to use, no scrubbing and got the job done. If you've got rust or hard water stains this will get rid of them.

This arrived when expected. It worked just like the product information said it would. I used it on heavily stained vinyl siding, a metal gas tank, a wood door and an air conditioner condenser unit. All of this has been getting sprayed with well water that has a high iron content. I sprayed these multiple times with NO scrubbing and like magic the staining is gone. This stuff works GREAT!

Removes rust stains effectively and quickly

We have ferrous iron in our well water and stains the concrete drive. Spraying this in liquid form dissolved the iron stains. Use the powdered form in the house toilet tanks to keep them clean. Stuff works wonders..

Just spray and watch the rust disappear.

Literally amazing! We had such bad iron stains on our fence and driveway from our sprinklers and this worked instantly and everything looks brand new again. I would recommend this product over and over again. Get the liquid though, not the powder. Power is harder to find the right mixture with water and doesn't work as good.I bought 12 gallons of the liquid and used it on our fence on about an acre of property, our driveway and pavers and worked on everything!

cleaned some, but not the stains

Works great on well iron water stain. Strong smell and can irritate skin. It’s the only thing works for me to clean iron stains on siding. Very easy to use. Bought 4 gallons— professional siding people wanted $1000 to clean. Used only less than 2 gallons for what I needed to do. Great product. Easy to use.