4-Pack Aluminum 4x4 Deck Post Base Cover with 3.5"x3.5" Waterproof Gasket — Open-Box, 13% Off

Premium Aluminum Material: Crafted from die-cast aluminum alloy 384, finished with UV-resistant powder coating baked at high temperatures, and equipped with a waterproof rubber gasket for dual protection, this eliminates issues like rot, cracking, and rust at their source, extending the lifespan of outdoor wooden posts.

Innovative Split Design: Featuring a hassle-free style split construction, this 4x4 post skirt installs without removing existing posts. Includes specialized assembly adhesive and waterproof rubber gasket for tool-free — no screws needed! Seamlessly conceals anchors, bolts, concrete residues, or structural flaws at the post base, preventing costly repairs while acting as a reliable post protector and post wrap.

Perfect 4x4 posts & 4-Pack Value: Specifically tailored for 3.5" × 3.5" posts and a base size of 6.5"x6.5", our 4x4 post cover offers 1.625" of height coverage. Sold as a 4-piece set—optimized for deck, porch, railing, and fence projects—delivering complete post bracket protection for multiple pillars.

Quick Snap Installation: Installation in seconds by one person—simply wrap the split post base cover around the post base, align it, slide it into place, and snap it shut. Finally, insert the waterproof rubber gasket. Slashes labor time, perfect for DIY deck, porch, or mailbox post upgrades without professional help.

Multi-scenario Post Protector and Decoration: This aluminum post sleeve safeguards wood and metal columns across settings: deck post base cover for patios, 4x4 post skirt for pergolas, post base trim for gazebos, plus mailbox post, porch, lamp posts, carports, garden pillars, and railing systems. Ultimate protector against weathering and aesthetic damage.

Fit Supplement Note: This aluminum post base cover features a precise 4"×4" inner dimension. Paired with the included 3.5"×3.5" waterproof rubber gasket, it perfectly fits popular nominal 4"×4" wood posts (actual 3.5"×3.5"). The gasket creates a tight compression seal for better long‑term water and rot protection than regular snug‑fit covers. It also fits true 4"×4" posts directly without the gasket.

This 4x4 post base cover in aluminum provides a clean, finished appearance for deck posts, porch columns, and fence posts. Designed to conceal the hardware and base of standard 4x4 inch posts, this cover offers both aesthetic appeal and practical protection. The aluminum construction ensures durability and resistance to rust and corrosion, making it suitable for outdoor applications in various weather conditions. Installation is straightforward, allowing you to quickly enhance the look of your deck or outdoor structure. The cover slides over the post base to hide unsightly brackets, anchors, and connectors, creating a polished, professional finish. Ideal for new construction projects or renovation work, this post base cover helps complete your outdoor living space with a refined touch. The lightweight aluminum material makes handling and installation easy while maintaining long-lasting performance.