Federal Composite Azek Post Caps by Nantucket Post Cap

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Since 1988, The Nantucket Post Cap Company has been creating fine post caps, finials, arbors, gates, benches, tables, and pergolas made out of the highest grade of redwood and cedar, and now composite Azek material.  Azek Post Caps are a great way to protect and enhance your fence post or deck post without the worry of future maintenance.

Azek post caps must be painted in order to ensure proper performance over the years.  Azek post caps accept paint easily and hold paint much longer than traditional wood post caps.  Azek material is a perfect mix of beauty and functionality.  It looks, feels, cuts, and shapes like wood, only it does not rot or deteriorate.

Federal Azek Composite Post Cap:

  • Impervious to insects and moisture
  • Will not rot, split, twist or warp
  • Looks and feels like wood
  • Accepts paint easily for a custom color
Due to the manufacturing process, when Azek is cut, the heat generated by the blade leaves a yellowish hue on the surface.  We strongly recommend painting the product white or any other color of choice (this is also needed for warranty).  The texture of the Azek Post Cap is also slightly different compared to standard Azek boards.  This happens because Azek is cut at an angle which exposes the naturally rougher interior of the product.
Azek post caps are special order items.  Please see the shipping information tab below for further details.

How to choose the correct Azek post cap size:

Nantucket Post Cap LogoNantucket Post Caps are sized according to the actual physical measurement of your deck or fence post.  All post caps are made 1/8" larger on the opening then the actual post size you specify.  For example, if your 4x4 standard post truly measures 3-1/2" x 3-1/2", then you would choose that size and your cap would come with an inside measurement of 3-5/8" x 3-5/8". 

All Nantucket Post Cap products are made in the U.S.A.


Azek post caps are special order items and usually ship within 3-7 business days.

Please see our return policy for additional details.