Stanley company makes some stuff call try-it.Or Oxi+bleech let it sit a while.If that dont do it get some concrete acid.It will take it righ off.Hope this helped.Good =Luck

If you find a way, and if you’re bored, please email me and tell me how you did it. I can’t see how results would be dramatic; but you could probably help the stains with some of this advice you’re getting through all these people.

Oh yea…. I personally would stay away from muriatic acid… although it is sometimes used for cleaning up excess cement; it reacts with and EATS cement upon contact. Yes, masons use this (this is in my area of work) to clean off excess cement that is on the face of bricks that otherwise makes for a sloppy looking job… but masons try and avoid using it, as it erodes the outermost SMOOTH face of the finished cement instantaneously and leaves it more vulnerable to water infiltration , plus erodes your cement instantaneously, leaving it more suceptible to taking on stains in the future. I think it’s a safe bet that the stain has seeped into the concrete, and is below more than the surface, so this wouldn’t remedy the situation.

One idea… if you find something that would break up old coffee stains out of fabric, the same will probably work in the concrete. Allow a diluted solution of that cleaner to soak on the stains; let it soak in deeply. Be sure to first check an area in the corner to make sure the cleaner itself does not end up staining the floor (which test could take days.) You are going to have to “lift” the stain out of the concrete, which is going to require some sort of “lifting” suction action. How about a towel spread over the stains and pour salt all over it? This will “suck” the water and cleanser out of the concrete, and hopefully at least some of the stain along with it. I’m not sure the towel would be enough to stop the salt from seeping through the other way, and leaving possible salt stains as a result.

That’s a touchy situaton you’ve got there. I’m not sure you’re going to fix it…. without painting the surface or something along those lines.

Hope I’m not just rambling….

for what it’s worth.

There seems to be some confusion here. An expansion join is installed when pouring against a vertical surface (garage slab), and at roughly 20′ to 25′ intervals. A “control joint is scribed into the slab with a “Scoring Tool” or a concrete saw, at 10′ to 12′ intervals. The intermittent “expansion” joints are set up like a form and staked into place. when pouring the slab, pour evenly against both sides of the expansion material so as not to move it from its position, If this is your first attempt at pouring concrete, you’re making a big mistake. You obviously don’t know what you are doing, this will be a very costly DIY project for you. Concrete has 4 simple rules:
1. It’s heavy.
2, It gets hard.
3 It cracks.
4. NOBODY EVER STEALS IT.

Kitty litter will soak up the majority of it, then try a concrete cleaner.

I would install an expansion joint half way across your driveway, running the entire length of the drive (parallel to the drive), and then at 10-12 foot intervals across the driveway (perpendicular to the drive). It will be best if you install the joints before you pour the concrete, best using expansion joint material (available at hardware store). This can be held in place using short pieces of rebar driven into the ground and then run some tie wire through the expansion board and tie off to the rebar (keep your rebar at least 1″ below finished surface). Alternately, you can drive in 2 pieces of rebar, with the expansion joint material in between them. You ca also use wood instead of expansion joint material, but the wood will end up rotting out in 5 or so years.

Go to a pool supply store and get some muratic acid.
Careful not to let it sit too long as I will take the top layer of cream off of the concrete.

you should put an expansion joint every 10 feet.

place a cross form at 10′, pour that, remove the cross form, put a felt strip across and pour the next section, continue till finished

you can buy felt strips at home depot or lowes

I read somewhere that for oil stains on the driveway you should pour good old coke generously over the spills…(not the zero or diet versions!!!) leave it there for 30 minutes and then spread old newspaper over it. When the newspaper dries out after a few days, It will lift the oil stain. Repeat if the oil has been for a long time. I have never personally used this method….but no harm trying!!!

There is products for that, here’s a few I found online, hope it works.

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