First, I must mention that I am often questioned about the term "thinset." This is frequently used to describe a mortar tile installation. For example, one may say, "I used thinset." Actually, the correct definition of thinset as applied by the Tile Council of America (TCA) is that the term is used to describe the method of installing tile with a bonding material usually 3/32- to 1/8-inch in thickness. By this definition, a thinset installation would include organic mastic and epoxy systems.