I have two water stains on my front steps where I removed two potted
I have tried everything to remove the stains, but nothing really removes
A neighbor mentioned using a two-part epoxy paint to cover this area.
Has anyone done this with success? My concern is the moisture in the
concrete and what will that do to the paint i.e., flaking, etc.
Bleach the concrete. Non-clumping kitty litter (the clay type) will
also absorb anything water or oil based out of the concrete.Dry
portland cement worked into the surface will also absorb any oils if
they are involved in the staining.
Using an oxygen bleach may work where chlorine does not, or vise
versa. The last thing I would do is try to make paint stick to and
cover a stain.
A pressure washer may be required to get it clean too.
Is the concrete currently painted?
If so re-paint it.
If not, you might try power washing it.
Around here our concrete turns darker from tree sap
and other stuff. A power washer gets it back to "clean".
I hate to have to paint things so I'd think a long time
about painting concrete.
On Monday, April 4, 2016 at 10:09:17 PM UTC-4, net cop wrote:
I'd try one of the products for iron stains and similar, available
in the plumbing dept at HD, etc. If it's iron based, they make
it disappear in seconds. And whatever it is, good chance they
Unless you are really bothered by the sight IN THE SHORT TERM, you might
just wait a while and see how that portion of the concrete weathers, now
that it will be exposed to the elements in the same way as the portions
surrounding it HAVE BEEN.
I've used Benjamin Moore two part industrial epoxy to do several garage floors.
It's great stuff, lasts covered for over 10 years depending on traffic.
Uncovered, it fades a bit over time, but still looks good. Comes in almost any
color, but unless you have a unusual decorator sense, the light greys as close
to natural concrete are probably best.
If the concrete is more than six months old and the footing was properly laid,
there shouldn't be an issue with moisture. If the concrete is already spalling
(chipping off or crumbly), epoxy won't preserve it.
It's not cheap - the good stuff is sold by the gallon and you need a gallon of
Before you go that route, you might consider cleaning the concrete with muratic
(swimming pool) acid. Nasty stuff, but it's also recommened as prep for the
epoxy, so if it doesn't work you haven't wasted the effort.
My vote would be to not paint the concrete steps. Once you paint them, you
cannot un-do that option. Once painted, they can become more slippery, they
will have to be repainted every so often, and if they are outside I think
they will begin to peel and flake sooner or later anyway due to the weather,
water, freezing, etc.
You may want to try the pressure washer idea that others suggested. I
recently pressure washed a house including the concrete block foundation on
the outside. The pressure washer worked well on the concrete block (and
everywhere else). I had never used a pressure washer before. I rented an
electric pressure washer from Home Depot and it was easy to use. I only
used plain water in it and no detergents or bleach etc. and that worked
well. But, you may want to try adding bleach or detergent for your use.
Others here may know if adding bleach or detergent would be a good idea or
If you do get this resolved, let us know what worked and what did not work.
On Wednesday, April 6, 2016 at 9:58:31 AM UTC-4, TomR wrote:
My experience with using a pressure washer on concrete is that they
are great at removing dirt, grime, mold, etc, but not effective at
removing stains. I've seen what she has, ie stains from flower pots
and I doubt a PW is going to remove them, because they have leached
into the concrete. I'd try one of the rust/stain remover products
made for toilets, sinks, etc.
You are probably right. And, of course, trying one of those CLR-type
rust/stain remover products first would be a lot easier and cheaper.
I wonder if she will try any of these options and post back here what worked
or did not work.
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