In the 1970s, polymer-based terrazzo was introduced and is called thin-set terrazzo. Initially polyester and vinyl ester resins were used as the binder resin. Today, most of the terrazzo installed is epoxy terrazzo. The advantages of this material over cement-based terrazzo include: a wider selection of colors, 1/4 inch to 3/8 inch (.63 cm to .95 cm) installation thickness, lighter weight, faster installation, impermeable finish, higher strength, and cracking less. The disadvantage of epoxy resin based terrazzo is that it can only be used inside, not outside buildings. Epoxy-based terrazzo will lose its color and slightly peel when used outdoors. Cement-based terrazzo will not.