Maintenance of Metal Post Caps
Copper and stainless steel post caps come with a thin, clear marine lacquer designed to protect them before and during installation. Once exposed to the elements, the sun’s ultraviolet rays, moisture, and pollution begin to break down this coating, exposing the metal underneath.
Copper
In its natural state, copper breaks down in the elements and develops a patina. In general, copper progresses from a natural salmon color to a series of russet browns and grays, and finally to a blue-green or gray-green patina.
- To maintain the shiny look, apply a car wax immediately after purchasing the cap, and reapply every 3 to 6 months.
- To remove an already tarnished finish, remove the old coating with mineral spirits and grade 0000 steel wool. Buff with grade 0000 steel wool for a satin finish; for a mirror-like finish, apply a car wax. Spray with a clear lacquer or polyurethane. Let dry and apply a car wax.
- To encourage a natural patina, remove the lacquer with mineral spirits and grade 0000 steel wool.
Post Cap FAQ's
Will my copper post caps remain a shiny copper color?
Our copper post caps come with a thin, clear marine lacquer designed to protect them before and during installation. Once exposed to the elements, the sun’s ultraviolet rays, moisture, and pollution begin to break down this coating, exposing the metal underneath. In its natural state, copper breaks down in the elements and patinas. In general, copper progresses from a natural salmon color to a series of russet browns and grays, and finally to a blue-green or gray-green patina.
What does “patina” mean?
“Patina” refers to the natural weathering of copper due to airborne sulfur compounds, which gradually change copper’s surface color. The resulting color, called a patina, depends on location and climate. Salt, moisture, sunlight, ultra-violet rays and pollution can affect the final color. In general, copper progresses from a natural salmon color to a series of russet browns and grays, and finally to a blue-green or gray-green patina. To maintain the shiny look, apply a car wax immediately after purchasing the cap, and reapply every 3 to 6 months. To encourage a natural patina, remove the lacquer with mineral spirits and grade 0000 steel wool.
How do I keep my copper post cap from turning green/patina?
To maintain the shiny look, apply a car wax immediately after purchasing the cap, and reapply every 3 to 6 months.
Can I speed up the patina process on my copper post caps?
To encourage a natural patina, remove the lacquer with mineral spirits and grade 0000 steel wool.
Installation
How do I attach the post cap to the post?
We recommend using an exterior-grade construction adhesive to adhere the cap to the post. Apply the adhesive liberally to the inside of the cap and place the cap firmly over the top of the post. If you prefer to use Brad nails, be sure to pre-drill all nail holes to avoid splitting.
What preservative is used to protect pressure-treated wood post caps?
Our wood post caps are protected by CA-B (Copper Azole Type B), an EPA-registered pesticide containing copper and azole compounds to protect it from termite attack and decay. For more information, refer to the Copper Azole Safe Handling Information.
Do I need to apply a finish to my wood post caps?
As with all wood products, we recommend that you coat these with a high-quality exterior finish to preserve the wood's natural beauty and ensure a lifetime of enjoyment. Apply to all wood areas, including the underside of the cap, before installation.
Should I allow my treated wood post caps to "season" outdoors before I apply a protective finish?
No, our treated wood post caps are kiln-dried and do not require a drying period. We recommend applying a protective finish immediately.