Removing oil stains

Are your potential customers washing their windows, buildings, pumps, walkways, etc with a waterhose? If not they shouldn't worry about oil stains because the concretes so dirty you probably can't see the stains.

If they are washing anything outside the building, or if it rains, then oil is going down the drain........They are probably violating some law just by washing down their walkway. Look at all of the chemicals off of the road that go down the storm water drains after a good rain. Ever noticed that nice glow to the puddles of water in a parking lot after a good rain?

The epa is not only concerned with what you use to remove the stains they also care about what you are removing. Oil, gas, etc......

Now Jim made a good point about getting the job done. But muriatic acid is very dangerous and CANNOT be washed down storm drains in any state in the USA. Also, the concrete needs to be resealed when using any kind of acid wash.

As you know concrete is very porous. Dry chemicals will not soak down into the concrete.

About the best thing dry to use on a fresh oil stain is cat litter.

The best product to use personally at your own home is carb. cleaner. Just don't smoke when applying carb. cleaner. HIGHLY FLAMABLE!

Pappy