Powder coating is a type of coating that is applied as a free-flowing, dry powder. The main difference between a conventional liquid paint and a powder coating is that the powder coating does not require a solvent to keep the binder and filler parts in a liquid suspension form.

The coating is typically applied electrostatically and is then cured under heat to allow it to flow and form a “skin”. The powder may be a thermoplastic or a thermoset polymer. The most common polymers used are polyester, polyurethane, polyester-epoxy (known as hybrid), straight epoxy (fusion bonded epoxy) and acrylics.  Powder coating creates a hard finish that is tougher than conventional paint.

Here’s a bowl full of Speedhound’s TRO Orange “paint” waiting to be applied.

TRO Orange powder

There are several advantages of powder coating over conventional paint.  In addition to the durability of the coating, this process is very green:

  1. Powder coatings emit zero or near zero volatile organic compounds (VOC).
  2. Powder coating overspray can be recycled and thus it is possible to achieve nearly 100% use of the coating.
  3. Powder coating production lines produce less hazardous waste than conventional liquid coatings.