In the kitchen of our home, previous owners installed parquet flooring directly onto slab foundation. Huge water leak and floor buckled. No hope in saving floor! We have taken up the old flooring but as you guessed, adhesive was left behind on slab. We have ordered new vinyl to put on floor but are concerned that if we do not remove adhesive, it will cut through floor over a period of time. Have tried "mineral spirits, sanding and acetone. No luck! Is there any product out there that can be used to tackle this awful job. PS Elbow grease is available! Thanks.