Plastic powder - material of powder coating line	Standard color card	Tubes covered with powder coatings

Two basic types of powder coating plastic finishes are available: thermoplastic and thermoset. Typically, purchasers and manufacturers examine overall costs and potential coating complexity when deciding which type is most appropriate for their application. In each of the two classifications, there are a variety of sub-groups, and each individual powder is engineered for specific finish qualities.

Thermosets
Thermoset powder coating is applied the same way as thermoplastic powders. Unlike thermoplastic, thermosets go through a chemical cross-linking reaction that is non-reversible when baked. This cross-linking changes the physical properties of the plastic, typically hardening them into a solid coating. Some thermosets have the ability to withstand temperatures of over 1,000 degrees Fahrenheit and can compete with high temperature enamel paints. Thermosets cure harder than thermoplastics, and as some of these thermosets harden, they also become brittle, especially in thicker coats.

Epoxy
Epoxy coated surfaces are hard and electrically insulative. They are brittle, however, and when exposed to UV light (present in sunlight) they tend to chalk and dull over time. This disadvantage keeps most epoxy-coated items indoors or buried underground as pipe coatings.