I removed some 8x8 vinyl tiles in a relative's home. The tiles came off very easily, but what remained was a very thin layer of black adhesive. I tried using a heat gun and scraper, that just made the adhesive very sticky and it would not scrape off. I ordered this product and gave it a try. Instructions state wait and let it soak for 15-30 minutes It did NOT work for me. I tried scraping after 15 minutes, after 30 minutes, and after 45 minutes of soaking. It did not help in removing whatever the black adhesive is.