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CM-1040 Crown Molding

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

    Per PieceThat's Only
  • 1-24

    $19.95$2.53 / foot
  • 25-49

    $18.95$2.41 / foot
  • 50-99

    $18.50$2.35 / foot
  • 100+

    $17.95$2.28 / foot
  • Quantity
1 piece = $19.95 / 7 linear feet
  • Order a 10" Sample ($3.00)

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Shipping & Return Details


  • TypeMolding

  • Breadth4-1/2"

  • StylePlain

  • ColorWhite Primer

  • MaterialPolyurethane

  • Ceiling Height8' - 9'

  • Height4"

  • 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-1040 Crown Molding is a plain, 4-1/2" 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)



4.8 out of 5 stars
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Mark M.Myrtle Beach, SCJune 4, 2024

5 out of 5

Easiest crown moulding I have installed

Really pleased with the while process. It is so light you can install with one person. And the seams just disappear. Will be doing the rest of the upstairs for sure.

Tanya L.Houston, TXJuly 14, 2023

5 out of 5

Incredible customer service, Fantastic products. Great value. Fast shipping. Why can't all companies follow suit?

Orders are shipped super fast. Any question gets answered almost immediately. This last order was probably my 8th or 9th. Always super smooth transaction. Do not hesitate to buy anything here. You will be a fan after your first order!

Donna B.Palmyra, VAApril 15, 2023

5 out of 5

Looks beautiful and easy peasy to install!

Used this in a hallway and two bathrooms. Love that it's moisture proof. So lightweight I installed it by myself. Hint-Tack a 3" nail on the wall about an inch below the molding line, in the center of wall span, and this will hold the molding while you nail one end. Looks exactly like wood, sands easily and paints well. Been ordering from Udecor for about 8 years. Great customer service and beautiful products!

Gonca D.Fayetteville, NCMay 24, 2022

5 out of 5

Great customer sevice!

I love working with uDecor not only because of fast and prompt shipment but also there's great service afterwards.

Craig M.Temple, TXMay 13, 2022

5 out of 5

looks great, very easy to work with!!

great product will give your room a classic look

Maxine B.Sun City Center, FLMay 11, 2022

5 out of 5

Looks Great! Contractor Asked Where Did I Find It

This crown molding exceeded my expectations. When my contractor came to install it in the living room, he couldn't get over the fact that it wasn't wood. He took a sample with him. My friends were so impressed. Great price and great service!

Hua G.Milwaukee, WIMay 8, 2022

5 out of 5

Great product

Great product for our house. Reasonable price and very good service

Jorge P.Albany, NYFebruary 2, 2022

5 out of 5

Modern, sophisticated look

I bought this product for my guest room. This is the first time to installing crown molding, so the product came 2 days after ordering, all nicely packed and there was no damage. I like the modern clean look of the product I end up doing the same molding for second bedroom and for the master. I will get more to complete my living room too. I do like it very much. Will get more from them, if I decided to do more in the house

Gloria I.Troy, MIJanuary 3, 2022

5 out of 5


The crown molding looks great in my kitchen. It's not wood but it doesn't matter because you can't tell at all, especially after installation and painting. If it was difficult to install the contractor didn't say anything.

Scott P.Orlando, FLOctober 28, 2021

5 out of 5

Looks Fantastic

I want to thank you for the great crown molding product you offer. I will now be ordering this for my entire house to install., I received my order quickly and defect free. I can't thank you enough and wow how easy is this to install by myself. Thank you again Scott

Lisa H.Fairmont, WVJuly 19, 2021

5 out of 5

Looks great

Made our master bath room look awesome

Toni H.Liberty Lake, WAMay 19, 2021

5 out of 5

Beautiful crown molding

We purchased this molding to go into a master bedroom and bathroom with 9' ceilings. It looks amazing! Our contractors were amazed at the price as well as how easy it was to work with and cut. It didn't melt like some moldings they've used in the past. Great product! Fast delivery!

Jannine B.Silver Bay, MNApril 30, 2021

5 out of 5

Just what I was looking for!

Wonderful selection at UDecor! I was able to find exactly what I was looking for at a comparable price and it shipped fast and arrived in good condition.

Carlos P.Grayslake, ILApril 29, 2021

5 out of 5


Excellent product. Easy to install specially after watching the videos provided on your webpage. Completely changed the look of my kitchen. Gave it a fancy expensive look. I've told my coworkers and anyone that comes over my house about your product. Much better than using wood.

Dl B.Niceville, FLDecember 22, 2020

4 out of 5

Nice looking crown!

This was my first time installing crown molding! After I got the hang of it this stuff was pretty easy to work with and looks great in my house. Prices are very competitive and shipping was expeditious.

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