4" x 4" Vinyl Post Sleeve by RDI

Contractor Rebates
(33 reviews) Write a Review
$14.99 - $49.99
5.00 LBS
Calculated at Checkout
7-9 Bussiness Days

4x4 Vinyl Post Sleeves by RDI

Khaki on Sale - 20% off! *

SolarGuard® technology maintains like-new color


  • Vinyl’s base ingredient is rigid PVC (polyvinyl chloride) modified to provide superior strength and ultraviolet resistance.


  • Our vinyl is impact modified for flexibility and durability. All RDI post sleeves meet or exceed the requirements for long-lasting durability and performance after installation.

If you have recently purchased a home—or have even lived in the same home for a number of years—there may be some quick improvements that will help update a space and make a house feel more like your own. One quick home improvement that will do a world of good is upgrading old posts that support deck or porch railing systems. If you think that kind of work is bound to be costly, think again. Using vinyl post sleeves from RDI, you can give your porch or deck a much-needed refresher with very minimal cost. Simply apply the 4” x 4” post sleeves to any unsightly, weathered, or worn down posts, and you’ll notice an instant sense of accomplishment in making your home look welcoming and refreshed.Made from sturdy vinyl, this sleeve can withstand all kinds of weather, including humidity, rain, snow, and extreme heat.

RDI is so confident in the quality of its vinyl post sleeves that the company offers a lifetime warranty to guarantee your purchase.

Still have questions or need advice on ordering the right supplies for your project? Get in touch with Deck Expressions’ 24/7 customer service. We’re always ready to help.


  • Sleeves are designed to slide over existing 4x4 posts. 
  • Inside dimensions ~ 3-3/4" x 3-3/4"
  • Outside dimensions ~ 4" x 4"
  • Includes 1 ~ Bagged Post Sleeve
  • The Endurance Rail vinyl post sleeve is compatible with any vinyl rail system. The sleeve fits any nominal 4x4.
  • Note ~ Colors May vary 


  • 39"
  • 45"
  • 54" ~ (white only)
  • 100" ~ (white only)
  • 108"
  • 120" ~ (white only)


  • 1/8"



Click HERE for Warranty:

Click HERE for 6x6 Sleeves:






SolarGuard technology provides fade resistance so that your outdoor living products will maintain a like-new finish for years to come.

33 Reviews Hide Reviews Show Reviews

  • 5
    RDI Products

    Posted by Jerry on Nov 8 2021

    Purchased RDI post bases and sleeves. Great products, accurate and durable. Would like to see 2x4 sleeves and bases added to inventory.

  • 5
    4X4 post sleeves white

    Posted by John on Nov 5 2021

    I use them in horse corrals. Horses can’t chew them and they look great year round. Service very good

  • 5
    vinyl post sleeve

    Posted by Nick Vitulli on Oct 10 2021

    I renewed my deck railings without replacing the exist posts. The post were still strong enough but looked terrible. This was absolutely the prefect solution. Could not be more pleased.

  • 5

    Posted by Stephen on Sep 18 2021

    Great product. Easy to install. Excellent customer service!

  • 5
    Great product worked fine

    Posted by Sam G on Aug 9 2021

    They fit great nice quality

  • 5
    Very heavy

    Posted by Tina on Jun 28 2021

    The post covers were thick and heavy quality.

  • 5
    Post sleeve

    Posted by David Scott on Jun 5 2021

    They look great fit great

  • 5
    Fence posts.

    Posted by Deb Hoos on May 22 2021

    Exactly what I ordered. Price was great.

  • 5
    4&quot; X 4&quot; VINYL POST SLEEVE BY RDI

    Posted by Robert Wilson on Nov 21 2020

    Excellent product Every one was perfect fit

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