SentinelFormula 922 Urethane Adhesive Remover, 1 Gallon

This is the only remover I've found to remove hard urethane adhesive. But it will not work on thick coatings as it will not penetrate beyond a few millimeters even when completely soaked. If you can get the adhesive down to a thin layer then this will cause the adhesive to bubble off the concrete to easily scrape up.

This product made a sticky mess . After waiting an hour to try to scrape it did allow me to scrape it but it left a sticky residue that had to be cleaned up . It was just easier to use a scraper without the product . The only plus was that it was odorless . This company charged me half the price of the product to return it . Not worth the hassle

If you're looking for a product to remove urethane adhesive. This is the product that you have to purchase. Buy a cheap pump up sprayer. Spray a good coat on the adhesive let it sit for about 30 minutes and then it scrapes up like a hot knife through a butter.