Does anyone know how to remove a oil/grease stain from concrete very effectively? The company I used to work just put some degreaser detergent on the stain and we would scrub it in then begin washing the lot as normal. This would turn the stains a few shades lighter and that was good enough for them, but I would like to know a better way to completely remove or mostly remove these types of stains if there is a better way.

Thanks,
Larry Carden
Baker Power Wash
Claremore, OK

I'm dealing with the same cunundrum myself as I'm about to tackle a bunch of flat work for gas stations.

I'm new at this myself, but I think the most important thing to have is hot water.

As far as pre-treating, I heard sodium hydroxide works well to spray on and let it dwell for a while...

Thanks I'll have to look into that. I have done alot of gas stations in the past and the degreaser we used worked pretty well on the oil stains at the regular gas pumps over a period of time, but the diesel pumps would never clean up as good.

Are you using hot water and a surface cleaner?

Check out the ingrediates on a can of oven spray at your local grocery store. Most, if not all, contain Sodium Hydroxide.

A cheap way to experiment.

Thaks guys, I used some sodium hydroxide last night. It was a cleaner called T.T.A Roadway Cleaner, I'm not sure if anyone has heard of it. But, it worked really well. And yes I am using hot water and a surface cleaner, the Big Guy 28" from Whisper Wash to be exact. It knocks the cleaning time down significantly.

Thanks again for the help!

I don't know where to buy it but I heard about some stuff called eatsoil at the PWNA wood certification class. I think it's an enzyme based compound tha completly removes oil and grease.

Henry Bockman
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the enzyme principle would work on hydrocarbon chains theoretically...

if i remember correctly, an enzyme is used to break down molecular chains, and once it does its job on one, it keeps on moving to the next chain.

Where would one buy this type of chemical from ?