No floor drain.I did a job sealing a warehouse floor once.To clean it we used murtic(sp) acid.I just got done using the speedy dry.When I had the spill I was out of speedy dry so it sat for awhile before I got back to it.I scraped the floor with a coal shovel and then with a wide plaster scraper.I like the idea of wetting the speedy dry.I don't know if the acid would eat it up.How about using bleach to wet the speedy dry??.It is stained pretty good.