Akona Concrete & Masonry Dissolver - Removes & Softens Concrete, Mortar, Masonry, & Cement, Heavy-Duty, Great for Tools & Mixers (28 Ounce, 1)

It really works. I had a driveway replaced 4 years ago and the workers got little concrete splatters all over the garage door. It didn't bother me much honestly. They offered to take 10% off the price since they couldnt get it off and had to go to the next job that day. 4 years later, I've tried vinegar, pressure washer, nothing worked. Finally, a contractor friend came by one day for a party and he told me to look up this stuff. I ordered off here, and got it in a few days. Sprayed it on and let it sit for 30min, then sprayed a bit more on and scrubbed with a tire brush. All of the concrete remnants completely came off my painted garage door without any residue whatsoever after I sprayed it with a hose.The only negative is that it kinda made my concrete white! Kind of like it oxidized the solution dripped onto the concrete. I was able to use a brush and pressure washer to clean it off, but just be aware that this may cause your concrete to become chalky.

I got the product timely Manor. It was a few days before I use it, but I sprayed it all a few of the tools that had concrete on it and it done very good job of dissolving it and so I could clean the tool.

Had to remove 2 year old concrete from iron railing and this worked like a charm. This was not a few simple streaks, these were dried on drips over a foot long and in some spots 1/4” thick. I wrapped paper towels around the uprights and soaked them with the solution, let them sit for about 30 minutes, and went to town on them. Because I had to paint the rails anyway I took the them with a scraper, in some spots in just wiped off, in others I had to go at it with the tool, it honestly worked great! Be warned do not wet the concrete first, be prepared to put some work into thicker spots, and put drops clothes down because it will start to eat the existing concrete. This solution definitely weakens the thicker spots where just a few taps with the scraper got the big chunks off. I will be buying this again 100%.

The media could not be loaded. I would need a gallon of this stuff and I would have to reapply it over and over and over again to even soften one little strip of tile mortar.

Sprayed on concrete a year old on vinyl siding. It seem to speed up the removal process enough to justify buying it.

A concrete truck on the highway was leaking cement onto the road as it traveled. Unknowingly, I pass the truck and later could not wash off the spatters. After some research I found this product, which amazingly took off the cement splatter with no scrubbing.

Loved this product. It worked quickly but did not damage my auto finish. I used a plastic scraper to get the concrete off. It was finished in about ten minutes. Took longer to set up the task. Very happy to have found this product.

Read the other reviews, don't know why it did not work for others but worked well for me after driving through some wet concrete and not getting round to dealing with it for about a year!! Need to give it enough time to penetrate to concrete and took 4-5 applications to work through the layers as the dried concrete was pretty thick in places. Also used a cheap plastic scraper to get the stubborn spots off. Don't expect to spray it on and wash it off and be done - be patient, let the chemicals do their work, expect it to take multiple applications to get everything off, and put in some elbow grease / effort, and it does deliver results.