When I clean concrete with detergent or pressure washer, it turns dark and stays dark, even when dry.
What can I do to make it turn white, without waiting a year?
TIA Clark
OT; Why does concrete turn white?
Dec 25, 2006
5 Replies
If you want white concrete it is advisable to use white cement in the mix.
If you want to change the color of the concrete you have now, paint it.
Clark Magnuson wrote in news:26GdnV4-es- kgg3YnZ2dnUVZ snipped-for-privacy@comcast.com:
That's strange - when my pale-grey sidewalk gets dark I know that it's time to wash IT!
Are you sure that the concrete wasn't colored dark when it was poured? [My front "porch" was dyed dark red when IT was poured. ]
Try some bleach....
Clark Magnus> When I clean concrete with detergent or pressure washer, it turns dark
Damp beach sand is darker than the same beach sand when dry. I suspect the darkening is due to moisture below the surface; can you try holding a wet/dry vacuum over a spot for a minute, to see if it gets dryer (and lighter)?
Bleach it! That's right goo old laundry bleach.
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