Is this just the concrete after being cleaned or did cream get stripped?
Looks like magnesium in the concrete mix. How old is it?
Edit: calcium chloride, not magnesium
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not sure of exact age but probably 6-8 years old or more
I see that in my area too from time to time….
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I just did my back patio for the first time and got the same thing…I just assumed I screwed it up or etched it or something
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Everyone needs to bookmark this site. Has a lot of answers to your concrete problems
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