Metal Coil/Flats: Same Day Pick Up In Arizona

Black Phosphate®: A Better Alternative To Bonderized Steel

Do you want the look of a Bonderized roof or wall, but without all of the problems? Black Phosphate® has a longer lifespan than Bonderized and has less color variation.

A Black Phosphate Alternative: Bonderized

A Better Alternative To Bonderized

Black Phosphate®

Lifespan: Black Phosphate Vs Bonderized

Black Phosphate will develop less white and red rust when compared to Bonderized steel that's installed in an exposed application and without any paint.

There is a coating that's applied on top of the galvanized substrate that's called InterCoat ChemGuard. This coating is designed to enhance the zinc performance on galvanized steel. We've done testing that will show the difference between the two.

How Much Does It Cost?

  • Cost about the same as Bonderized steel
  • About 20% less expensive than Kynar® painted panels


  • Better durability and will develop less white and red rust versus Bonderized
  • Less color variation versus Bonderized
  • Better cut edge protection
  • Beautiful black zinc appearance


  • Black Phosphate® is NOT a paint lock material that's designed to be post painted
  • It's not gray like Bonderized
  • Handle with gloves to avoid finger prints
  • No warranty
  • Not a painted finish

Western Lock® - Black Phosphate®

Standing seam metal roofing is the most common metal roofing. The fasteners are concealed for both weather tightness and stream lined appearance.

See Product

7/8" Corrugated - Black Phosphate®

7/8" corrugated metal roofing has deep wavy corrugations that look stunning on your metal roof. Structurally strong, incredibly impact resistant.

See Product

Western Rib® - Black Phosphate®

Western Rib (7.2 Panel) is the strongest panel that we manufacture. It's capable of longer spans between supports. This makes it a great option for jobs without wood roof decks. 

See Product

T-Groove® - FlushWall/Soffit Panel

Flush Panels for use in wall, fascia and soffit applications. Rounded interlocking leg and concealed fasteners improve appearance and strength. Painted and Galvalume®. Made to your specific sizes.

See Product

Narrow Groove® - Black Phosphate®

These metal siding panels are perfect when you want a flush wall panel that's less than 12" wide. Narrow Groove® is available in 8" and 10" standard panel widths.

See Product

Western Reveal® - Black Phosphate®

Mix and match different reveals, face sizes, and widths.
Modern design with 1", 2" or 3" reveals.
Horizontal or Vertical Installation.

See Product

Board & Batten® - Black Phosphate®

 Once mainly used in country style homes and buildings, this style has now seen a renewed use in large scale architectural projects. Metal board and batten is the perfect fit for both commercial and residential projects.

See Product

Western Wave® - Black Phosphate®

This remarkable rigid wall panel with concealed fasteners offers a distinctive look with bold shadow effects that emphasize the panels unique rib profile. Horizontal or Vertical Installation.

See Product

Related Products


Real Rusted Roofing

Rusted Roofing is produced in two different finishes: A606-4 (aka Corten) or Bare steel. Available panels include corrugated, standing seam, R-Panel, flush wall & more.

Check Out Corten Roofing Products

Do You Have Questions about metal roofing? We have the answers.

The Metal Roofing Learning Center

It's a great resource for contractors, architects, and homeowners.

Easy to navigate learning center with videos and blogs that will answer your questions.

  • Installation Videos
  • Panel Comparisons
  • Cost
  • Much More

Visit Now

Let your imagination run wild!


Choose Different Textures, Colors, Finishes, and Panel Types On Your Home Before You Decide.