Post Kit for Fortify Vinyl Railing
What it is
A post sleeve kit used to finish and support vinyl railing systems on decks, porches, or stairs. It’s designed to slide over a structural post (usually a pressure-treated 4x4).
What’s included
- 4" x 4" vinyl post sleeve
- Post cap (top decorative piece)
- Post skirt / base trim (covers bottom)
Note: The structural wood post is NOT included—you install this over an existing post.
Key features
Easy installation
- Slides directly over a standard 4x4 post
- DIY-friendly—no special tools needed
- Low maintenance
- No painting, staining, or sealing
- Clean with just soap and water
- Durable vinyl construction
Resistant to:
- moisture
- rot
- insects
- UV/weather damage
Clean finished look
- Covers raw structural posts
- Matches railing systems for a cohesive design
Sizes & compatibility
Heights: 39", 45", 54" x 4"
Fits:
Color options
- White
- Tan
- Khaki

When you’d use it
- Installing a new deck railing
- Replacing old wood posts with a maintenance-free finish
- Upgrading appearance without rebuilding structure
USAVinyl, LLC Limited Non-Prorated Warranty for Vinyl Fencing & Railing
USAVinyl, LLC proudly warrants that its Weatherables® Vinyl Fencing, Vinyl Railing and Vinyl Outdoor Products are free from defects in material and manufacturing workmanship. Depending on the owner classification, USAVinyl’s Vinyl Fencing, Vinyl Railing and Vinyl Outdoor Products will not chip, rot, crack, or experience excessive discoloration under normal atmospheric and weather conditions for the warranty period. Product which experiences color change due to normal weathering is excluded from this warranty (including non-uniform fading and color changes resulting from unequal exposure to the sun and elements). For the color Khaki, Tan, Gray, Cedar, and Coastal Gray, abnormal discoloration is defined as a change in color greater than eight (8) Hunter units of Delta E. This Warranty is only for products manufactured by USAVinyl, LLC. All products and all accessories not manufactured by USAVinyl, LLC (including, but not limited to - D&D Technologies, Nationwide Industries, Mayne, Eden, LMT, Classy Caps, Waymark, and all fabrics and all lighted post caps) have their own warranties by their respective manufacturers.