Concrete/Masonry Etch & Cleaner

Used to remove oil stains and it worked quite well to do the job.

Worked to lighten oil spill on my garage floor. Doesn't make it go away, but it looks much better than plain soap.

Works ok .not as good as i got in a floor refinishing kit.

It cleared the calcium on my foundation wall so I could prep to paint it. It also cleaned the concrete really well. I recommend it if you’re looking for a very thorough clean and to eliminate mineral buildup. Rinse thoroughly before I thought it was ineffective until I realized I was seeing leftover product on the walls and not minerals coming back. Also make sure you purchase a good scrub brush, gloves, safety goggles, and a shower cap. This stuff is pretty strong and can splash as you scrub. After using the product I followed up with drylock sealer. I recommend the entire product line for improving old concrete.

Did an ok job with a motor oil spill, but still tough to get all the stain out

I bought this and used exactly the way it says to. I had two stains from candles in my driveway. This didn't remove the stains.

This did wonders on removing the white efflorescence on ceramic tiles on my outdoor patio. As soon as I applied the mixture you could see it bubbling and dissolving away the efflorescence. Where the white stuff had really built up, I used a razor scrapper to loosen it up. I did have to do 2 or 3 applications to get it all out, but each time the amount of white had been reduced significantly. I have no idea what the negative reviewers say about it smelling awful - mine had very little smell. Note - I am not using this on porous material like brick.

We have been uncovering the original fireplace in our 1906 home. It was plastered over long ago (so long that I was finding horse hair in it). I tried water and vinegar and a wire brush after physically chipping it all off. None of those were cutting it so I got this stuff. I don't know if I would have really noticed a difference without the before picture, but it looks so much cleaner now! We did chip off some of the larger plaster chunks before using it, but the white film is so much better.