Bonderized Steel Supplier

What is Bonderized Steel?

Bonderized steel, also referred to as paint grip steel, is galvanized steel that has been put through a phosphate bath and a chromate dry. This process produces the dull grey color characteristic of paint grip galvanized steel which provides an excellent "primer" for painting applications. Bonderized material should be immediately painted after installation as the exposed phosphate coating is prone to white rust.

Bonderized Steel Process

In a continuous, controlled process, coils of galvanized steel are first thoroughly cleaned and rinsed. A conditioning agent is then applied to promote the formation of a fine crystalline zinc phosphate coating. This process then converts the bare galvanized surface to an inert, crystalline zinc phosphate which is subsequently rinsed and sealed with a dried-in-place chromate conversion coating. This entire process creates what is called a Bonderized surface. 

Bonderized Steel

A long-time favorite of the rainwater goods industry, zinc phosphate provides the perfect surface for field painting of flashing, gutters, downspouts, and other roofing materials, as well as signs and even enamel-coated interior fixtures.

Benefits of Paint Grip Galvanized Steel

  • Ready for immediate painting
  • Dull gray appearance
  • Improves life expectancy of the paint applied to it

We also offer galvannealed steel, an alternative to bonderized steel, which is carbon steel coated with zinc on both sides by the continuous hot-dip process.

Bonderized Steel Size Chart

Product-Coated: Bonderized/Paint Grip | ASTM:A653 | Grade: CS-B | Coating:G90 | Surface:N/A | Treatment: CT-Dry
18GA (.0566 MAX - .0466 MIN) *** 48 60
20GA (.0506 MAX - .0356 MIN) *** 48 60
22GA (.0436 MAX - .0296 MIN) *** 48 60
24GA (.0316 MAX - .0236 MIN) *** 48 60
26GA (.0247 MAX - .0187 MIN) *** 48 60

As one of the largest locally owned flat-rolled steel product distributors in Texas, we make it our top priority to provide high-quality bonderized steel for you at a competitive price. Let Curtis Steel be your Bonderized Steel supplier! Give us a call at 1-800-749-4621 or contact us online and get a quote today!