Should sealed concrete look like this?

12 days ago
last modified: 12 days ago

My friend had her slab house concrete sealed and she didn’t like the job they did the first time because they didn’t sweep the floor before they applied the sealer and it had dust flakes in it. So they came back and used a polisher with a diamond plate, ground that off, cleaned it and then resealed it. Still was not up to standards but she was ready to move on and said good enough. Well they recently moved in and she accidentally dumped water on her floor and it looks like it soaked into the concrete. Should sealed concrete look like this? Can anything be done to remedy this disaster? I would like to seal my basement concrete in my new home but obviously won’t be using whomever did her floor!

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