Powder coating is a type of coating which is applied as a free-flowing, dry powder to metal materials.
The powder is applied to the fastener heads using an electrostatic gun. The gun imparts a positive charge to the powder, which is then applied to the fastener by compressed air spraying, and then accelerated to the fasteners by the electrostatic charge.
Once an even coating has been applied, the fasteners are heated, which causes the powder to melt into a uniform film. As the fasteners are cooled, this then hardens into a hard, durable coating; capable of withstanding the harshest weather conditions for years to come.