Concrete cleaner?
#7
The concrete pad next to my house has turned blackish in a number of spots-mostly from leaves left on the surface too long. I'd like to clean it off, but its soft enough that a power washer causes pitting, and I don't want to use bleach or any other toxic stuff.

Any suggestions?

TIA,

Tony
Tony
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#8
Straight Simple Green and Baking Soda mixed into a paste, scrubbed with a stiff brush.
Mark Singleton

Bene vivendo est optimum vindictae


The Laws of Physics do not care about your Politics   -  Me
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#9
I dumped a bottle of windshield washer fluid on my garage floor a while back and just swept it with a still broom. I was really surprised at how clean it got the concrete. Not sure how it would do with tannin stains but it's cheap enough to give it a quick try. Let us know if you try it.
Mike


If you're the smartest person in the room, you're in the wrong room!

But not today...
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#10
trisodium phosphate

If that doesn't work, muriatic acid, But read up on it first.
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#11
Wet & Forget
Any free advice given is worth double price paid.
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#12
Summer sun takes care of that at our place.
"Don't force it - get a bigger hammer!"
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