Polyesters are the most commonly used powders in the coating industry, offering excellent value for money. There are two widely used types of polyester powder: TGIC (tri glycidyl isocyanurate) and TGIC-free (also known as Primid). Both TGIC and TGIC-free polyesters provide good mechanical resistance, including flexibility, impact resistance, and chemical resistance. One advantage of polyester powder is its low cure temperature, making it suitable for coating sensitive items. Polyesters also exhibit good overbake resistance, preventing yellowing and ensuring ease of use. Standard polyesters offer 1-3 years of UV resistance, making them suitable for most interior and some exterior applications. They come in a vast array of colors, gloss levels, and special effects, providing limitless options. Polyesters have well-rounded properties and are commonly chosen for various applications.

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TGIC-free polyesters offer all the advantages of TGIC polyesters without the use of TGIC. They can also provide higher first-pass transfer efficiency. However, they are more sensitive to excess film thickness and offer less overbake resistance compared to TGIC polyesters.

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As the workhorse of powder coatings, polyesters have few drawbacks. For applications requiring exceptional durability and wear resistance in permanent outdoor exposure, super durable polyesters should be considered instead. The main disadvantage of standard polyesters is their limited exterior durability.