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.  more