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Getting Rid of Moss and Algae on Concrete?

How do you get algae off of concrete?

By jim from Australia

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April 28, 20100 found this helpful

Bleach and a scrub brush.

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April 30, 20100 found this helpful

Its caused because of dampness, try painting over it.That's what I did.

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February 8, 20170 found this helpful

I concur. Painting over algaea is the most stupid, thing I ever heard of, when all you have too do is wait for the sun to be hitting the affected area, and bleach ,then rinse,and rinse,and rinse!!

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Anonymous
February 10, 20170 found this helpful

Lol.

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Anonymous
May 1, 20171 found this helpful

I guess you can paint over the concrete once you get rid of the moss.

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May 13, 20170 found this helpful

There is a positive to painting over concrete. Many people do it in their basements. Painting over it works as a sealant, as water (any moisture) can soak into concrete therefore leaving it open to algea or mold growth.

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Please don't be so quick to judge something before asking...you have a better chance of learning that way! Hope that answered your question as to why!

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May 13, 20170 found this helpful

I'm sorry.... I didn't mean you should just paint OVER the algae. Properly clean it first then paint for further prevention

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November 20, 20170 found this helpful

You can paint over the concrete after you remove the stuff. The Dry Lock Masonry Concrete paint locks in the moisture and can last for a couple years. The Paint is very thick so it requires a big strong paint brush or roller; I used the gray color, looks great when done.

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November 20, 20170 found this helpful

Certainly ou can paint concrete, just remove the yukky stuff first!

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April 7, 20180 found this helpful

Don't bleach in direct sunlight as UV breaks down the chlorine quickly,gives it a longer reaction time too.

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Anonymous
July 2, 20180 found this helpful

It is so stupid painting over concrete it would make it more slimey .

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February 14, 20190 found this helpful

I have painted all my garden walls. A nice white to make the small garden welcoming and bright as the grey is dull and boring

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April 10, 20200 found this helpful

we bleached our green moss growing on our concrete steps, scrubbed well, rinsed, let dry well, then painted them white last fall. Today I'm looking at still green moss on side of steps eating away at the concrete causing it to fall off in chunks. Any advise?

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April 10, 20200 found this helpful

We bleached scrubbed dried and painted last fall this spring mold is back and eating away the concrete

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April 25, 20200 found this helpful

Some concrete slabs are under decks and don't see much direct sunlight (parts don't see any direct sunlight) and algae forms. However I'm not sure painting would work as a long term fix.....

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Anonymous
January 14, 20160 found this helpful

Ammonia solution works wonders for me

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May 7, 20170 found this helpful

I was told Ammonia with a soapy solution is used to clean canvas canopies and boat covers instead of remaking the canopies and covers. A wide broom an be used as a brush. DON'T mix bleach and ammonia or you'll create poison gas. DON'T use bleach at all. This should work on concrete too.

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September 21, 20160 found this helpful

Can I spread farm lime over driveway?

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November 18, 20160 found this helpful

How do you get algae off concrete

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