Top 10 Best 4x6 fence post caps in 2026

Last Updated - 6/15/2026

🏆Best Choice

SIEDiNLAR

SIEDiNLAR Solar Post Lights Outdoor 2 Modes LED Deck Fence Cap Light for 4x4 5x5 6x6 Posts Patio Garden Decoration Warm White/Cool White Lighting Black (2 Pack)

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•【Two Color Modes】The Siedinlar solar post light has two modes (warm white & cool white). It is equipped with 4 LED lamp beads. Additionally, LED post light combines stylistic details with sleek, modern lines and may coordinate well with all different styles of decoration.
•【Easy to Use】Install them according to the instructions, fix the base by supplied screws on the wooden post. Solar powered post lights are charged in the daytime for 6-8 hours under the sun, and will turn on for 10-12 hours in the nighttime automatically.
•【Applicable Size】Our solar post cap lights are equipped with 3 different sizes of bases, which are compatible with 4x4, 5x5, 6x6 inch wooden posts. This makes it a versatile option for homeowners expecting to put a cap light on multiple pillars, it is perfect for posts, decks, patios, fences. You may also choose to mount it on outdoor tables and other flat surfaces.
•【IP44 Waterproof】Solar fence post light has an IP44 waterproof rating and is made of tough ABS. It will withstand harsh heat, heavy downpour, and snow. You can rest assure to use, in any outdoor environments.
•【Note】If there is any problem with the Solar Post lights, please feel free to contact us. 1 year warranty and 24 Hours customer service.

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$19.99

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FEACORT

Solar Post Cap Lights 12 Pack, Fence Post Solar Lights, Warm White/Cool White Lighting, Black Waterproof Outdoor Post Lights for Garden Patio Porch, 4x4, 5x5 or 6x6 Vinyl/Wooden Posts

9.7

ChoiceComparer.com Score

9.7

/ 10

Outstanding

Main highlights

•✔️【2 Color Modes】The solar post cap lights offer two lighting modes - warm white or cool white. Warm white gives a relaxing glow, and cool white gives a bright glow. The light color can be easily adjusted using the switch located at the base of the solar post cap light. Equipped with 16 LED beads, it is 20 lumens of bright light, which is perfect for evening parties, garden decoration, outdoor lighting, deck decoration, fence decoration, and patio decoration
•✔️【IP64 Waterproof Design】12pack fence post solar lights have been upgraded to IP64 waterproof, no need to worry about light rain, snow, frost, or sleet, etc. Our fence solar lights are made of weather-resistant ABS material, suitable for long-term outdoor use. Ensure durability and stable performance in various weather conditions. Ensure stable operation throughout the season. In stormy weather, please place the solar lights indoors to avoid damage to the solar panel
•✔️【Easy installation】4x4 post solar lights come with installation instructions on the outside and inside of the packaging fence post solar lights are designed with multiple base options, making them compatible with standard, 4x4, 6x6 wood, 4x4, 5x5 vinyl, or plastic posts for easy installation(The wood mount is 0.5 inches smaller than the listed size). Mount the solar light on the fence post using the included mounting screws.
•✔️【Solar powered& Longer Lasting】Equipped with high-efficiency solar panels, it requires no electricity. Powered by the sun, automatically absorbs sunlight and stores energy during the day, and automatically turns on the light at night. It fully charges in 6–8 hours under direct sunlight and can keep a bright light at night. Each light includes an 1000mAh NI-MH AA rechargeable battery, allowing your outdoor space to glow long time and creating a green lifestyle easily
•✔️【Garden/Patio/Decoration 】The 4x4 post solar lights single Dimension: 5.8 x 5.8 x 3.54 inches, mount on fences, deck railings, or boundary pillars throughout your front garden, enhancing pathways, drive approaches, patio, and garden borders. Solar post cap lights project radiance to accentuate flowerbeds, highlight architectural features. decorate your fence, deck, patio, porch, and landscaped gardens while complementing outdoor living spaces

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$53.98

$79.99

-33%

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PASAMIC

PASAMIC Solar Post Cap Lights 2 Pack, Solar Post Lights Outdoor Waterproof with 2 Color Modes, IP44 Deck Solar Powered for 4x4, 5x5, 6x6 Vinyl/Wooden Posts, Decorate Deck, Patio, Porch, Fence

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•DUAL COLOR MODES: Elevate your outdoor space with our solar post cap lights, designed to offer an ideal blend of warmth and brilliance. Choose between 2 elegant lighting modes: a soft, inviting warm white for a tranquil atmosphere or a cool white for vibrant clarity. With 8 precision-engineered LED beads, these solar post lights offer a harmonious glow
•ENERGY EFFICIENT & AUTOMATIC ON/OFF: Say goodbye to electric bills. Our solar post cap lights charge effortlessly throughout the day, requiring just 6-8 hours of sunlight for a full charge. As night falls, they illuminate your space for 10-12 hours, powered by the sun. The intuitive automatic on/off feature ensures that your 4x4 post solar lights turn on at dusk and off at dawn, allowing you to enjoy a seamless lighting experience
•EASY TO INSTALL: Designed with simplicity in mind, our solar post cap lights are easy to install. With 3 different base sizes to fit 4x4, 5x5, and 6x6-inch posts, they integrate beautifully with your outdoor posts, fences, and decks. No wiring is needed - just screw the post light onto your posts and secure it with the included screws. It's a smart, simple solution that enhances your space without the hassle of complex installations
•WEATHER-RESISTANT: Crafted from sturdy ABS material, our solar post cap lights are as durable as they are elegant. With an IP44 waterproof rating, they are built to withstand rain, snow, heat, and cold, making them the great companion for your outdoor sanctuary in every season. Whether under the summer sun or a winter snowstorm, these solar post lights outdoor waterproof provide reliable, enduring beauty
•WARM REMINDER: Operating these solar post cap lights is a breeze. Simply activate the power button, place the deck post lights solar powered in direct sunlight for a full 8-hour charge, and enjoy the peaceful ambiance they bring. Each set comes with clear, easy-to-follow instructions for a smooth setup. Please refer to the included manual for proper setup and use. Your outdoor space will shine with understated elegance and comfort

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$15.66

$19.99

-22%

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Azdele

Azdele 4x6 Heavy Duty Aluminum Pyramid Post Caps Cover for 4x6 Nominal Wood Post(Actual 3.5" x 5.5" Post Size), with Matte Finish Powder Coated Surface, Fences Wood Post of Decks or Corridors 4Pack

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

Main highlights

•【Fit for wood post size】: The interior dimension of this matte black pyramid cap is 3-5/8" x 5-5/8", made for 3-1/2" x 5-1/2" size post(NOT for other size post). Robust and beautiful!
•【Product size】: The height of the pyramid post caps is 1.63in/4.1cm, 0.69in/1.75cm lip extends down side of wood post, sidewall thickness is 2mm. The solid thickness and reasonable size layout make it look well-proportioned and generous.
•【Sturdy pyramid shape】: This matte black pyramid post cap cover is made of high-quality aluminum alloy, finished with a durable layer of powder-coat paint on its surface, allows it to withstand heavy wind and rains, 100% Anti-corrosion/rust-proof. UV-Protected, Prevent from fading due to sun exposure. Longer lifetime!
•【Easy installation】: Each package contains four 4x6 black post caps and eight black screws, just put the post cap on the 4x6 nominal wood post, and then screw the two screws into the wood post through the small holes on both sides of the post cap. Very easy installation!
•【100% satisfied】: If you are not satisfied with the size or quality of this 4x6 black post cap(actual/true 3.5” x 5.5” size post), Our post caps have a one-year warranty, please feel free to contact us by email if you have any question.

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$31.99

$36.99

-14%

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Decorex Hardware

3.5" x 5.5" Heavy Duty Aluminium Pyramid Post Cap for True/Actual 3.5" x 5.5" Wood Posts - Black (Works ONLY with Actual 3.5" x 5.5" Posts. Will NOT Work with Actual 4" x 6" Posts)

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•!! WARNING !! Works ONLY with TRUE / ACTUAL 3.5" x 5.5" Post Size. !! Will NOT Work with Actual 4" x 6" Posts !!
•Easy installation - includes all mounting hardware needed for installation (2 black stainless steel screws). Holes should be pre-drilled in post for easier fastening.
•Made of high quality cast aluminum - Black Finish Powder Coated.
•Heavy Duty - sturdier than any other post caps on the market. Prevent your posts from premature rotting.
•Protection - great way to keep deck and fences in great shape. Add years to the life of your investment. ***Photos of this product may not represent exact color/shade of the actual product.

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$12.99

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Decorex Hardware

4" x 6" Heavy Duty Aluminium Pyramid Post Cap for True/Actual 4" x 6" Wood Posts - Black (Works ONLY with Actual 4" x 6" Posts. Will NOT Work with Actual 3.5" x 5.5" Posts)

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

Main highlights

•!! WARNING !! Works ONLY with TRUE / ACTUAL 4" x 6" Post Size. !! Will NOT Work with Actual 3.5" x 5.5" Posts !!
•Easy installation - includes all mounting hardware needed for installation (2 black stainless steel screws). Holes should be pre-drilled in post for easier fastening.
•Made of high quality cast aluminum - Black Finish Powder Coated.
•Heavy Duty - sturdier than any other post caps on the market. Prevent your posts from premature rotting.
•Protection - great way to keep deck and fences in great shape. Add years to the life of your investment. ***Photos of this product may not represent exact color/shade of the actual product.

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$12.99

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TonGass

TonGass (24-Pack, Black) 4"x6" (3 5/8x5 5/8") Wood Fence Post Caps - Wooden Fence Cover Deck Post Cap, Durable Plastic Water-Proof and UV-Proof, Protect Wooden Poles from Cracking and Rotting

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•For 4 x 6 (3 5/8" x 5 5/8") fence posts - Most 4x6 fence posts actually have nominal dimensions of 3 1/2" by 5 1/2". Once planed, the side would be around 3 5/8” by 5 5/8"
•With inside dimensions of 3 5/8" by 5 5/8" and an edge height of 1/2", these black plastic fence post caps will fit perfectly on most fence posts
•Made from thick, highly durable and weatherproof plastic, our plastic post caps are UV and heat-resistant, impact-resistant and waterproof. There won't be fading, cracking for years to come
•The black caps will slip easily on top of the posts. Even when the post is a few millimeters bigger, the caps will flex enough to fit, but it won't stretch further
•There are 4 options in securing the caps to the posts: tape, nails, screws and adhesive. For tape, stick some mounting tape inside the cap and then snap on. For both nails & screws, you'll need to drill a pilot hole in at least two sides of the caps. If using an adhesive, ensure that said adhesive will bond on both plastic and wood

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$32.99

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ATLANTA POST CAPS

4x6 Post Cap (3.5"x 5.5") Brown New England Pyramid Style Square Top for Outdoor Fences, Mailboxes & Decks, by Atlanta Post Caps

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•Fits standard 4x6 post (3.5"x5.5") up to (3.75"x5.75") MEASURE POST BEFORE ORDERING. Caps slide down post 1.5", and come with mounting screws Caps are shipped upside down make sure to flip base over before installing
•We have proudly been manufacturing our patented post caps for over 20 years in GA. Made out of same material luxury automobiles use for mirror casings, bumpers and grill. 10 YEAR NO-FADING guarantee! longest in industry. ASA resin
•GUARANTEED to outlast any wood post cap or finish on powder coated post caps. Ideal for coastal locations salt has no affect and added UV protection to increase longevity. The 1st choice of Quality fence and deck builders around the country. In house knowledgeable customer service.
•Easy to Install: Atlanta Post Caps patented SNAP-Caps feature a fast, simple installation process. Simply place the base on the post, attach it to the base with the included screws, and snap the top on the base for a secure fit. That's all it takes, and the screws are hidden after installing

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$13.99

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TonGass

TonGass (6-Pack, Black) 4x6 (3 5/8"x 5 5/8") Wood Fence Post Caps, Wooden Fence Deck Post Covers, Durable Plastic Water-Proof and UV-Proof, Protect Wooden Poles from Cracking and Rotting

8.6

ChoiceComparer.com Score

8.6

/ 10

Good

Main highlights

•For 4 x 6 (3 5/8" x 5 5/8") fence posts - Most 4x6 fence posts actually have nominal dimensions of 3 1/2" by 5 1/2". Once planed, the side would be around 3 5/8” by 5 5/8"
•With inside dimensions of 3 5/8" by 5 5/8" and an edge height of 1/2", these black plastic fence post caps will fit perfectly on most fence posts
•Made from thick, highly durable and weatherproof plastic, our plastic post caps are UV and heat-resistant, impact-resistant and waterproof. There won't be fading, cracking for years to come
•The black caps will slip easily on top of the posts. Even when the post is a few millimeters bigger, the caps will flex enough to fit, but it won't stretch further
•There are 4 options in securing the caps to the posts: tape, nails, screws and adhesive. For tape, stick some mounting tape inside the cap and then snap on. For both nails & screws, you'll need to drill a pilot hole in at least two sides of the caps. If using an adhesive, ensure that said adhesive will bond on both plastic and wood

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$18.99

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JSP Manufacturing

JSP Manufacturing Fence Post Plastic Black Cap 4x6 (3 5/8" X 5 5/8") Fits Treated Posts Multipack Made in USA Wholesale Bulk Pricing (2)

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•4x6 (3-5/8" x 5-5/8")Plastic Black Fence Post Caps
•Multipack Quantity Item - Please verify correct quantity needed
•Cap presses over the outside of a 4x6 Post, a little flex, but will Not Stretch.
•Can be secured with nails or glue, should be pre-drilled if securing with nails. Can be painted, must use a paint that adheres to plastic.
•Inside Dimension 3-5/8" x 5-5/8" Square, 1/8-inch-thick to protect your treated posts from water and sun damage

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$8.98

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