I have it in my garage. It was done by a previous owner. Who ever did it didn't do a very good job, because I still sweep up chunks of it all the time.
Someone told me that if the concrete isn't sealed it will sweat and cause a seperation between it and the coating. I don't know if that is true or not, but the floor in my shop sweats alot in the spring and if that's the case I can see why you would need to seal it prior to coating it. It also seems to be the concrete that is plained (smoothed) that sweats not the brushed.
My 2 pennies worth.
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