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  • CM-1085 Crown Molding with MC-4164 Corner Block

CM-1085 Crown Molding

3⅛" Breadth x 94½" Length
Best for 8' - 9' ceilings
  • Quantity

    Per PieceThat's Only
  • 6-24

    $15.40$1.96 / foot
  • 25-49

    $14.65$1.86 / foot
  • 50-99

    $14.20$1.80 / foot
  • 100+

    $13.90$1.77 / foot
  • Quantity
    6 minimum Need less?
6 pieces = $92.40 / 47 linear feet
  • Order a 10" Sample ($3.00)

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  • TypeMolding

  • Breadth3-1/8"

  • StyleRope

  • ColorWhite Primer

  • MaterialPolyurethane

  • Ceiling Height8' - 9'

  • Height2-1/4"

  • Width2-1/4"

  • Length94-1/2"

  • Print/DownloadProduct Spec Sheet


  • Product Video Placeholder Image
    Product Video
  • Product Video
    How To Install Crown Molding
  • Product Video
    5 Tips for Finishing Crown
  • Product Video
    What is Architectural Polyurethane?

Product Description

Quick Facts

  • Made from dense durable Polyurethane
  • Lasts a lifetime
  • Mold and mildew resistant
  • Lightweight and easy to install
  • Safe to install indoors or out
  • Exquisite detail and design consistency
  • Won't crack or splinter like wood or hard plastic

CM-1085 Crown Molding is a rope, 3-1/8" breadth crown molding typically used in rooms with ceiling heights of 8' - 9'.

uDecor crown molding is manufactured with a dense architectural polyurethane compound (not Styrofoam). Polyurethane is durable and 100% waterproof. The material can be sanded to shape just like wood.

A major advantage of polyurethane is that it is safe to install in rooms with the presence of moisture like bathrooms and kitchens. This product will not encourage the growth of mold or mildew.

This molding is delivered pre-primed for most paints. Always test your paint on a small section to make sure there are no compatibility issues with the paint and primer. Most home latex paints work great on our molding.

Read the DIY Pro Tips section about using adhesive when installing.

  • Breadth - the distance between the outer contact point with the ceiling to the bottom contact point with the wall.
  • Height - the distance between the ceiling and the bottom contact point with the wall.
  • Width - the distance between the wall and outer contact point with the ceiling. The breadth is the hypotenuse of the right triangle whose legs are the width and the height.

Our crown molding installation video, walks you step-by-step through a full installation, including how to measure for crown molding, with plenty of tips on how to make your project look amazing. Below are some of the key things to remember.

Use Adhesive for a Lasting, Seamless Finish
Apply a small bead of adhesive along the length of the molding on the back where it contacts the wall and the ceiling (watch). Finish nails help secure the molding while the adhesive sets. Most importantly, apply adhesive between any molding being joined end-to-end.  You will need 1 tube of adhesive for about every 6 pieces of molding. Loctite’s PowerGrab or PL Premium work well in most applications.

The Final Piece
Cut the last piece you install on each wall just a little long. 1/16 to 1/8 of an inch is usually enough to allow you to snap that piece in place, making sure all your joints stay nice and tight. This is easiest to do when you leave the last two feet of the previous piece unnailed (watch).

Our moldings do not need to be primed. Plus, since polyurethane does not absorb moisture, paints that are self-priming or a Paint & Primer in One may not dry properly. Standard latex paint is less expensive and will give you the best result.

Be Mindful of Temperature Effects
All materials expand and contract with changes in temperature. For best results, when installing on a hot day, keep the molding inside until you are ready to make your cut.

25 Year Limited Warranty

You're making a beautiful upgrade to your home and we're here to help protect that investment. We guarantee that your polyurethane millwork will be free from manufacturing defects for twenty-five years from the original date of purchase.

Warranty Conditions and Limitations

This warranty covers material defects in our polyurethane products when used in standard applications where temperatures do not exceed 150°F. It does not cover labor, consequential or incidental damages. This warranty is not transferable and applies to the original purchaser only.

  • Polyurethane products are for decorative uses only.
  • Polyurethane products need a finish coat of paint during installation; it is the purchaser's responsibility to make sure their paint works well with the product (test and let dry on a small piece first).
  • Before installation, allow your polyurethane product to acclimate to room temperature for 15 minutes.
  • All polyurethane moldings must be installed with tight fitting joints (see installation instructions) as well as adhesive between the joints to prevent seams from expanding during changes in season.

We're Ready to Help

Unlike a car, not much can go wrong with a polyurethane product since polyurethane doesn't absorb moisture and won't be affected by insects. However, in the rare event that you do encounter a defect with your product, we're here and ready to help. Just give us a call and we'll work with you to identify the problem and, in case of defect, supply you with replacements.


At, we know that projects take a while, and sometimes plans change. To start a return, please call us at 1-877-550-0600 or email; we'll be happy to assist you!
  • 90 day return window with no restocking fees
  • Products must be unused/new and in their original boxes
  • Customer is responsible for return shipping cost (we are happy to help arrange shipping)
  • Partial returns where the quantity discount tier would change are refunded the difference between the original total and the total based on the kept quantity (see example)



4.9 out of 5 stars
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Nathan S.Safford, AZNovember 29, 2023

5 out of 5

Elegant and lightweight

I love the crown molding we purchased. It looks elegant and is lightweight! Very easy to work with.

Cj W.Eagle, IDSeptember 10, 2023

5 out of 5

Great Moulding

This was beautiful, timely and best of all for us...cost-effective! Great service!

Lutchman P.Royal Palm Beach, FLSeptember 5, 2023

5 out of 5

Looks Great, especially combined with the Corner Block

The finished Crown moldings with the Corner blocks just look Great. May even get more for other areas in the house.

Jack W.Clearwater, FLMay 8, 2023

3 out of 5

OK but difficult to install

This molding I got gave me a lot of trouble to install. Could be the molding profile or batch. The thickness of the molding was not very uniform and the edges of the moldings also were not uniform. That caused issues at the joints. I tried scarf and butt joints and both had issues getting them lined up correctly. Caulking did help some but lightweight spackle helped. If I had to do it again I would have cut then glued all the pieces on 1 wall first and then install on the wall rather than glue and install on the wall

Hi Jack, thank you for taking the time to share your experience! A tiny amount of variance is normal with molding products in general, but with a bit of trimming or shimming and painter's caulk to cover the seams, you should have an amazing look without too much work. We do recommend caulk, because spackle has no give and can crack during season changes where your walls expand and contract. Thanks again for your review, and for including us in your project!
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Tatyana M.Brooklyn, NYMarch 9, 2023

5 out of 5

Amazing customer service

Had the pleasure of speaking to Jason. He helped multiple times and was very knowledgeable. Highly recommend and refer Udecor

Steve M.Ridgefield, WAFebruary 6, 2023

5 out of 5

Easy to work with!

That applies to both the product and Niquie. So much easier to install than wood trim and everyone thinks it is wood. Niquie is an example of what customer service should be like.

Steve M.Ridgefield, WASeptember 3, 2022

5 out of 5

Make your molding installation easy.

Very easy installation. Much easier than wood.

Robert P.Rohnert Park, CAAugust 1, 2022

5 out of 5

Very Positive !!

Great Company !! Very hands on and responsive.

William M.Glenside, PAApril 12, 2022

5 out of 5

The crown molding looks great.

Great company - Great customer service! Edde was awesome! Will highly recommend.

John C.Litchfield, MEMarch 31, 2022

5 out of 5

Excellent Product!!

Ordered this for our home and it came within a few days of placing the order. It is very light and easy to install.

Kusal D.Newtown, PANovember 2, 2021

5 out of 5

Review of uDecor Crown Molding CM-1085

The CM-1085 Crown moldings were very excellent made and looks great after installation. We are very happy and love the installed crown molding. I will recommend it to anybody who is looking for any moldings. Thank you very much uDecor. Kusal Das

Paula V.Cortlandt Manor, NYMay 13, 2021

5 out of 5

Great Moulding

My kitchen looks great with the molding. I'm extremely satisfied. Looks great

David C.Greenwood, INMay 11, 2021

5 out of 5

Looks good

Easy to order. Quick delivery. Easy to cut and a good look to the rooms

Danell I.Apache Junction, AZMay 7, 2021

5 out of 5

Looks great.

I am very happy with the crown moulding. It has changed the look of the room very dramatically.I would recommend this product.

Paula V.Cortlandt Manor, NYMay 6, 2021

5 out of 5

Excellent product

The crown molding is great. Easy to work with and pleasant to look at. It looks great in my kitchen.

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