For small stains on unfinished concrete try a homemade poultice.
How to get cooking oil out of concrete floor.
Cover the stain with.
Cover the entire blotted area with detergent and then start scrubbing it to make soap suds.
Take some powdered laundry detergent and sprinkle it over the wet surface.
Use enough sawdust to cover the stain and create a mound over it.
Use the soapy brush to scrub the baking soda into the stain until the stain is gone.
Make sure the detergent you use is ammonia free.
Using a stiff bristled brush start scrubbing the area.
Tb1234 to make an easy cement floor cleaner apply a thick coating of the baking soda to the stained area of the concrete floor and let sit for approximately 30 minutes.
Mixing ammonia with bleach creates a lethal gas similar to mustard gas.
Wet the scrub brush with warm water and apply a few squirts of the soap to the bristles.
Pour sawdust over the vegetable oil stain on your concrete surface.
Combine acetone with baking soda powdered sugar or flour to make a smooth paste and spread it on the stain.
Scrub with a plastic brush do not.
Sprinkle baking soda over the whole stain then pour on liquid dish soap one that s a grease cutter also covering the stain.
Once you see soap suds are formed stop for a while and let them dry onto the concrete floor.
Or try my home style hint first.
Sawdust absorbs spills on your concrete surface.
Allow the sawdust to absorb the vegetable oil for 30 minutes.
Scrub hard with a stiff brush for several minutes.
Scrub the gray stain with a solution of 1 cup liquid chlorine bleach 1 cup powdered laundry detergent and 1 gallon of very hot water.
Slowly pour liquid laundry detergent over the affected area and let the mixture sit for half an hour.
Cover the fresh spill with baking soda talcum powder or dry dish detergent.