When people fix old floors, they sometimes find sticky glue under the tiles. This glue is called mastic, and in very old buildings, it may contain asbestos, which can be harmful. To remove this glue, people use a special product called an asbestos mastic remover. It helps soften the glue so it can be taken off more easily. But before using it, it is important to learn if it is safe and how to use it the right way.