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Aggragate concrete grey spots on new patio


Posted by l howell on June 29th, 1999 01:51 PM

I just got a new concrete aggregate patio installed 5 days ago. Most of it is tan except for several areas that have a light grey powder over them.

Is this normal until the curing process has completed? Or does the patio need to be sealed.

I've also heard about using muractic acid to clean these off?

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