It is important to have the best interior post cap. We are here to help you pick the best one for your needs from all the best available products in market today.

Our review process: Show/Hide

Our Top Picks:

Best Overall: Buy: Greenlighting Interior Post Cap READ REVIEW

Best For Perfect Fit: Buy: Weatherables Interior Post Cap READ REVIEW

Best For Easy Installation: Buy: Azdele Interior Post Cap READ REVIEW

Best For High Quality: Buy: Captiva Interior Post Cap READ REVIEW

Best For Modern Style Lighting: Buy: Greenlighting Post Cap READ REVIEW

Best With Correct Size: Buy: Captiva Interior Post Cap READ REVIEW

Best Modern Design: Buy: Generic Interior Post Cap READ REVIEW

Best For Use: Buy: Island Post Cap Interior Post Cap READ REVIEW

Best Overall: Greenlighting Interior Post Cap

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Here, we present a cap that manages to win our hearts. It's the Greenlighting Interior Post Cap and it's widely considered as one of the all-around great caps you can buy. The greenlighting interior post cap works as advertised, is really nice and it is stay happy. Easy to mount to your highest point on the railing, this solar post cap light does not require any wiring and is entirely maintenance-free. Also, the cap looks great and it is ideal for nice light.

The cap provides long-lasting, ambient lighting without the hassle of external wiring. Moreover, this comes with greater exposure to direct sunlight, the solar light will provide longer run times at night. Finally, the greenlighting interior post cap measures 5.2" x 5.2" x 3.9.

Almost all buyers opine that the cap will not fit a full 4x4 post. And, they also found that the cap would fit 4 1/4, 3 1/2 & 5 1/4. In conclusion, at the price, they believe that they got a steal of a deal with it.

• This is easy to install on PVC posts however.
• This comes with adapters to fit 4” and 5” vinyl posts.
• This fits perfectly, it has led lighting and has a classy style.
• This fits on a 4”x4” post.

Best For Perfect Fit: Weatherables Interior Post Cap

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Next on the list, we've got yet another cap that manages to win our hearts. It's the Weatherables Interior Post Cap and it's widely considered as the cap that has the most suitable features. The weatherables interior post cap is manufactured from high - quality, durable pvc vinyl | will not fade, discolor or warp | uv resistant | water resistant | limited lifetime warranty. Plus, it is made of high quality vinyl, so you won't have to worry about sanding, painting, or sealing it. The post cap measures 7.75 inches high and fits externally on a true 4 inch by 4 inch post.

The cap is designed for easy installing and it is great for a great price. In addition, it looks great and it fits snugly. Above all, the weatherable interior post cap measures 3.5 inches x 3.5 inches.

Almost all customers opine that the cap fits snug enough where no glue is needed. And, they strongly agree that the cap is perfect and is a single heavier plastic piece so it should hold up better. And, a few also found that this post cap fits the 4 ” decorative post that covers the wood post. To sum up, many have used the weatherable interior post cap for more than a few months without any complaints, and it shows no sign of giving up.

• These are UV and water resistant for a lasting look that will never fade.
• If you have any questions, please message us.
• This fits perfectly and it is great for the perfect size.
• The post will go into the gothic cap 1.35 inches.

Best For Easy Installation: Azdele Interior Post Cap

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The Azdele interior post cap's material feels more premium than its price would suggest. The Azdele interior post cap is very easy and it is great for fit for wood post size. The Manufacturer says: Our post caps have a one-year warranty and can be re-shipped or refunded in full. This matte black pyramid post cap cover is made of high - quality aluminum alloy, finished with a durable layer of powder - coated paint on its surface, allows it to withstand heavy wind and rain, 100 % anti - corrosion / rust - proof.

Most importantly, the Azdele interiorpost cap allows for easy installation and it is sturdy.

One customer says - "This aluminum alloy post cap will make your post more beautiful and long-lasting in use. ". Almost all customers opine that the cap is the size that matters mostly, then the method of fasteners.

• This is constructed with high-quality and it is good for product size.
• One of the newcomers and featured product.

Best For High Quality: Captiva Interior Post Cap

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Best part: Captiva Interior Post Cap is comparatively low and it is available to ship in 24 hours. The captiva interior postcap fits 5-1/2" square posts. Make sure this fits by entering your model number. And, the cap is great for fence posts and it is made of excellent quality.

Lastly, the captiva interior post cap is attractive and has a solid design.

Most customers agree that the cap looks right out of the box. Moreover, they strongly agree that the cap looks like they acquired a patina. With no doubts, this cap passed the test and had very satisfied buyers eager to share their experience.

• It looks great, It is used for heavy gauges and has an attractive design.
• A shiny finish is not permanent without protective spray (sold separately).
• 100% copper will not rust; finish will patina to a rustic green color.
• Fits 5-1/2" square posts; interior dimension is 5-5/8".

Best For Modern Style Lighting: Greenlighting Post Cap

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We would, of course, be remiss if we didn't mention Greenlighting Post Cap for regular usage. The greenlighting post cap features bright white leds to provide a better quality of light distribution, and lasts up to six times longer than other types of lights. Each light is battery powered and includes a 1x aa 3.2v ni-mh rechargeable battery, which will keep your solar fence cap light shining bright. The postcap lights automatically turn on at dusk and off at dawn, providing long - lasting, ambient lighting without the hassle of external wiring.

Lastly, the greenlighting post cap measures 5.9" x 5.9" x 11.6.

Almost all buyers opine that the cap is easy to install...brighter than expected. In addition, a few also found that the cap is made of high quality, durable plastic, the weather resistant solar post caps provide 12 lumens and light up rain or shine due to the chargeable battery backup.

• It is elegant and has great style.
• They are much more efficient than traditional fluorescent or incandescent lights, saving you money.
• Simply screw the lights into your fence or railing.
• The Manufacturer says: our solar powered post caps are entirely maintenance-free without requiring any wiring.

Best With Correct Size: Captiva Interior Post Cap

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The Captiva Interior Post Cap's material feels more premium than its price would suggest. The captiva interior post cap protects fence and deck posts against rain, snow, debris and the elements. Say "hello" to the wood pyramid miterless post cap. These 1-piece post caps cover the top of the post better than any others on the market, and are guaranteed to never split at the corners.

The cap fits standard 4x4 posts to add to that, it is made of untreated cedar. Above all, the captiva interiorpost cap can offer this kind of guarantee because they are made from multiple pieces of treated wood, stapled or glued together.

In conclusion, the tone of buyers is very positive and we believe that the cap suits the purpose.

• Measure posts before ordering to ensure the correct size.
• This fits perfectly with the correct size and it is made of cedar.
• The only miterless post cap; cut from a single piece of wood.
• It is great with great quality and it is very solid.

Best Modern Design: Generic Interior Post Cap

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Compared with other caps in this category, the Generic Interior Post Cap has a convenient design. The generic interior post cap is made of solid red oak, for interior use only. This simple, modern cap will give your new post a finishing touch. Also, it is very easy and has a modern design. Finally, the generic interior postcap is easy to install with a liquid nail or other adhesive.

• Unfinished; can be painted or stained.
• Easy to install (slip over design).
• One of the newcomers and featured product.

Best For Use: Island Post Cap Interior Post Cap

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The Island Post Cap Interior Post Cap is satisfactory and appropriate and fits well with your daily purpose. The island post cap interior post cap is also available in four other styles. The "c" style beveled interior newel cap is made from premium woods and assembled with precision to finish your stairs or outdoor project. The " c " style cap includes a 4 - sided bevel ascending from the protruded finished edge. Above all, the island post cap interior post cap is perfect for use on staircase newels, yet equally suited for use on decks, railings, or fence post caps.

• Available in multiple sizes to fit your project.
• Available in multiple wood materials and common newel and post sizes.
• Post caps feature consistent graining prepared for sanding and finishing.
• Use this "c" style newel post cap for interior and exterior projects.