Polyester vs. Epoxy Powder Coat – Reviewing the Capabilities of Both
Regardless of whether you are an experienced professional accustomed to dealing with powder coatings, or you are new to the product, you may be aware of how beneficial these coatings are for the creation of durable, tough, and beautiful finishes. At Secoa Technology, we offer an extensive range of coating options to meet the requirements of your industrial applications. Let’s examine the differences in polyester vs. epoxy powder coat.
The following information regarding polyester and epoxy powder coatings may help you choose the best option for your application.
Polyester Powder Coating
As the most routinely used powder coating, polyesters provide excellent value for the money. To the most commonly used polyester powder forms are: TGIC and non-TGIC. Both provide great impact resistance and flexibility, good mechanical resistance, and good chemical resistance. It does have a low cure temperature, however, which makes it more suitable for sensitive components.
They are easy to use in part due to their overbake resistance to yellowing. You can expect between 1 and 3 years of solid UV resistance with standard polyesters which makes them beneficial for various types of interior and certain exterior applications. There is a wide range of colors and gloss levels, as well as special effects available in standard polyesters. They are a common option utilized in many applications.
For applications that involve items permanently outside, super durable polyester may be desirable to increase durability and wearability.
Epoxy Powder Coating
The first commonly used powders were epoxies. They offer considerable durability and excellent hardness. They are considered among the best in terms of corrosion and chemical resistance of the many available powders utilized for industrial purposes. It is a powder that is easy-to-use and adheres to metals very well. Excellent adhesion can be obtained through pretreatments of the metal involved, including sandblasting and phosphate coating.
When comparing polyester vs. epoxy powder coat, one disadvantage of epoxy powders is their inability to weather well. They can chalk and fade in the sun when subjected to exterior exposure. They tend to degrade after a few months under adverse weather conditions. On the other hand, they are highly suited for indoor applications.
Many primers are epoxy-based and exhibit excellent corrosion resistance and adhesion strength. Because they do not function well when subjected to the sun, they are utilized as a precoat underneath other paint types. This covers its weaknesses and utilizes its strengths at the same time.
At Secoa Technology, we provide a range of powder coating products and services to help you fulfill the specific needs of your projects and applications. Call our team today at 706.272.0133 or use our contact form to find out how we can serve your specific industrial coating needs.