There are cleaners at Home Centers for cleaning up most spills on cement. However, I don't know if they'll work for stain. I know they work on stains like oil, gas, transmission fluid, etc., etc..
You may want to start by looking on the can you spilt to see if there's a WEB site or a phone # to call for Customer Service. Be sure to tell them if the cement was sealed some time ago, or not. That's all I can suggest. My best to ya and maybe search the WEB yourself for 'key' words.