What are these cracks in the garage?

What are these cracks? I’ve uploaded a wide and a close up. This is in a garage, the wall is the exterior wall. It’s a slab on grade, no basement, no crawl space.
Are these cracks bad?
Thanks for the help!

Was this a painted floor?


In the second photo, it looks like a rectangle shaped outline. Maybe some chemicals were stored in that area and leaked.

Agree with Junior


Thank you sir!

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Jr nailed it. With proper prepping and application of a high quality (not from a big box store) sealer, it will be fine unless spalling has already started.


You’re welcome. :slight_smile:

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Nice to see you back Lukasz!..you have much experience to share with the members. :smile:

It was not, just concrete.