Removing a soaked in oil stain from concrete

[doorsjimjr]

As a civil engineer, I know Muratic Acid can be used to disolve concrete. good for surface stains and where excess concrete lands. it acts like peroxide and disolves the lime in the concrete....and can be diluted to get a less harsh cleaning action

 

[faross]

If you let acids sit to long it will put the concrete that's why we use it to etch before we finish a floor with paint or epoxy

 

[shrubs]

TY

 

[JeffK]

Can't say it works cause I haven't tried. But I've heard you can spread dawn dish soap all over it and just let it sit till it rains. After the rain stops the stain should be almost gone.

 

[bretthays]

What if you sand blast it if really stubborn?

I think that's what I am going to have to resort to. I have a really bad oil spot and some spots where I let rust converter drip onto the driveway from a trailer frame I was working on.

 

[shrubs]

From experience. OP on this topic.

Sand blasting or pressure washing. Not gonna take a DEEP/OLD STAIN out.

Fouling up the concrete is in play.

Maybe your technique is "that good" or the concrete is in a low visibility area so the damage you make in the concrete does not mattter.

All the best.