How can i keep dark stains from coming back to my concrete patio?

  5 answers
  • April Bullock April Bullock on Jul 19, 2017
    Depending on what is causing your stains, it sounds like algae. I use a simple treatment that most people already have in their kitchen. I mix 7 cups vinegar, 7 cups dishwashing soap, and 1 cup baking soda. (If you need a smaller amount, mix it 3 1/2, 3 1/2 and 1/2.)

    Saturate stains with mixture, let it dry completely, then hose it off.

  • April Bullock April Bullock on Jul 19, 2017
    *white vinegar and liquid dish soap, I prefer Dawn.

  • Robyn Garner Robyn Garner on Jul 19, 2017
    Sounds like it's an oil based stain. Pour blue Dawn dish soap on it and allow to sit overnight, covering with plastic if necessary to keep it from drying out. Then you should be able to use a stiff bristled scrub brush to clean it away.

  • Amanda Amanda on Jul 19, 2017
    I would clean it well, and then seal the concrete.

  • Jason Walker Jason Walker on Jul 19, 2017
    bleach wash and buy clear concrete sealant