Concrete stains that won’t budge
So I’ve tried dish soap and scrubbing. Oxygen bleach and scrubbing. Regular bleach. White vinegar. Power washing. All that happens is the area around the brown stains gets lighter making the stains seem even worse. Is there anything that has been proven to work and won’t poison the entire area around the cement? I was going to try those enzymatic concrete cleaners, but labels say they are for petroleum stains. These are not that. Is painting the only option? Or having it broken out and re-poured? Could it be sanded? I would brick face over it, but I already have brick on the house in that area, and that’s just too much brick. Thanks in advance for any suggestions. Not sure what caused these stains. Shouldn’t be mildew — nothing leaking in that area. There was some mossy-algae type stuff in another area from a gutter leak, but that just power washed away.
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