The two basic types of powder coatings are thermoplastics and thermosets. Thermoplastic powder coatings melt and flow during the heat process, yet the same chemical composition remains once they have cooled and solidified. The most common type of thermoplastic powder coating used is nylon powder. Thermoset coatings melt when applied to heat as well; however, these cross link with other reactive properties, or within themselves chemically. The chemical composition therefore is altered.