TonGass 24-Pack Black 4x4 Post Cap – Durable Plastic Fence Post Cover, Waterproof & UV-Proof

Overview

Enhance outdoor wooden posts with TonGass 24-pack black post caps. Designed for 4x4 posts (nominal) with inside dimensions near 3 5/8 inches and an edge height of 1/2 inch, these caps deliver a tidy, finished look while shielding the vulnerable end grains from moisture and exposure.

Crafted from thick, durable plastic, the caps are built to endure sunlight, rain, and temperature shifts without fading or cracking. They pair a timeless silhouette with modern materials, making them a practical upgrade for fences and decks alike.

Key benefits

• Weatherproof and UV-resistant plastic stands up to outdoor conditions
• Prevents water intrusion at end grains, helping maintain post integrity
• Elegant, low-profile design that complements any exterior
• Flexible fit with a 1/2 inch edge height that accommodates slight size variances
• Three securement options: nails, screws, or adhesive for versatile installation

Versatility and use cases

Whether you’re upgrading a fence line or a deck railing, these caps slide over most posts with minimal effort and hold firmly once secured. Slight flex in the cap allows a snug fit even if a post is a few millimeters larger than expected, reducing the need for post modifications.

The 24-cap pack provides abundant coverage for multiple posts across a project, delivering consistent aesthetics and protection without needing to buy smaller, more expensive sets.

What’s in the box

Each TonGass pack contains 24 black plastic post caps sized for 4x4 posts, ready to install and protect exposed end grains from the elements.

Why choose TonGass post caps?

These caps offer a practical blend of protection, appearance, and value. They’re designed to resist common outdoor challenges while maintaining a clean, modern look that complements various fence and deck styles. Use them to refresh old posts or to finish new installations with a polished, professional touch.