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🚚 Free shipping on orders over $50 CAD ★ Trusted on 1,000's of posts and counting ★ 🚚 Free shipping on orders over $50 CAD ★ Trusted on 1,000's of posts and counting
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  • Green 4x4 post cap fastened to a wood fence post
  • Green 4x4 post cap, top view
  • Green 4x4 post cap, back view
  • 4x4 post caps at different angles
  • Details about the ASA resin used to make the 4x4 post caps
  • Green 4x4 post cap, 3D view
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Green 4x4 Post Caps Multi-Pack | Fits Nominal 4"×4" Wood Posts | UV-Resistant, Weatherproof – Includes Green Screws

Green 4x4 Post Caps Multi-Pack | Fits Nominal 4"×4" Wood Posts | UV-Resistant, Weatherproof – Includes Green Screws

$12.49 CAD
$12.49 CAD
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Free Screws Included - Plus Extra Spares!

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Find out why homeowners across North America choose our caps ↓

AVOID UNATTRACTIVE SIDE BENDS

Designed with a top-mounted screw: no bent sides, no split posts

Effortless installation: a single countersunk screw locks in place and seals out moisture

Supplied with rust-proof premium deck screws

A textured surface that resembles metal

Will the caps fit my existing fence posts?

Yes, as long as your posts are standard nominal 4x4 lumber that actually measure 3.5" x 3.5". We recommend measuring your post top before ordering.

Are the caps UV-resistant?

Yes, all of our caps are UV-stabilized to resist fading and cracking over time. ASA resin the best option for outdoor applications and offers excellent UV resistance, weather resistance, and color stability.

How many screws are provided with each pack?

We provide a screw for every cap, plus 20% extra:

5 Pack - 6 Screws

10 Pack - 12 Screws

15 Pack - 18 Screws

20 Pack - 24 Screws

30 Pack - 36 Screws

40 Pack - 48 Screws

60 Pack - 72 Screws

80 Pack - 96 Screws

Do you ship to the US and Canada?

Yes, we ship across North America.

How long does shipping take?

We process orders within 1-2 business days from our warehouse. After dispatch, the estimated delivery time varies based on the shipping method you choose and where you are located.

What is your return policy?

We accept returns within 30 days of delivery for unused items in original packaging.

How do I contact support?

Reach us through our Contact page and we'll respond within 1 business day.

Weather Every Season, Beautifully.

ASA resin badge used for 4x4 post caps

4x4 Post Caps: Weatherproof, UV-Resistant, and Worry-Free

Enhance the look and durability of your outdoor fence posts with Polaris Plastics 4x4 post caps. These high-quality fence post caps are made with ASA resin and are specifically designed to protect wooden fence posts and prevent cracking and rotting, ensuring the longevity of your fence.

4x4 Post Caps – Protect and Beautify Your Fence Posts

Give your fence posts the finishing touch they deserve with our premium selection of 4x4 post caps. Whether you're completing a backyard fence, a deck railing, or a garden enclosure, the right post cap does more than just look great — it protects your investment from the elements and adds a polished, professional appearance to any outdoor space.

Why Post Caps Matter

Exposed fence posts are vulnerable to rain, snow, UV rays, and moisture that can seep into the wood grain and cause cracking, warping, and rot over time. A well-fitted post cap acts as a barrier, channeling water away from the top of the post and significantly extending its lifespan. It's a small addition that makes a big difference.

What You'll Find in This Collection

Our 4x4 post caps collection includes a variety of styles to suit every project and aesthetic.

Designed specifically for standard 4x4 fence posts, these caps offer a snug, secure fit and come in a range of colours.

Elevate the look of your fence or deck with caps featuring classic flat pyramid tops, that add character and curb appeal.

Built for All Weather Conditions

Our post caps are built to withstand the demands of all weather — from harsh winter freezes to hot summer sun. Crafted from durable ASA resin, they maintain their shape, colour, and integrity season after season.

Easy to Install

Our 4x4 post caps are designed for a straightforward installation that anyone can handle. Simply place the cap over the top of your post and secure with the screw provided for an instant upgrade.

Browse our full selection of 4x4 post caps and find the perfect fit for your next fencing or decking project.