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CM-1040 Crown Molding

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  • Front Modern Crown Molding
  • Side Modern Crown Moulding
  • Profile Modern Crown Moldings
  • Crown molding udecor
  • Flexible crown molding
  • white flexible molding
  • Geometric Wall Accent
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Videos (3)
  • Product Video
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    How To Install Crown Molding
  • 5 Tips for Finishing Crown
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  • 25 -49 Pieces $15.00

  • 50 -99 Pieces $14.50

  • 100 + Pieces $14.20

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  • TypeMolding

  • Breadth4-1/2"

  • StylePlain

  • ColorWhite Primer

  • MaterialPolyurethane

  • Ceiling Height8' - 9'

  • Height4"

  • Width2-1/4"

  • Length94-1/2"

  • Print/DownloadProduct Spec Sheet

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.

Installation is simplified with the use of modern adhesives. Small finish nails are used to secure the molding while the adhesives set. See below for installation instructions.

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.

  • 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.

When planning for crown molding, inspect the walls and ceiling to see if any vents or other objects are within the footprint of the molding. Consider mitered returns at the ends of any molding runs that may be interrupted by these items. Allow 48 hours for the molding to acclimatize to the conditions where it will be installed.

It is easier to paint the molding before installation. Working at waist level is always better than working over your head. Paint your molding before you start the installation process. Then touch up the imperfections after you are done with the install.

ALWAYS test a section with your paint of choice before committing to painting all of your molding. Paint formulations change all the time and you want to be sure there is no adverse interaction between your paint and the primer on the molding.

Joining Pieces-
Always use an appropriate amount of adhesive on the end of any of the molding being joined end to end. This prevents the molding from separating as the house walls expand and contract with temperature changes.

Last Piece on a Wall-
For a tight fit and seams, cut the last piece that is going to be on a 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.

Lining Up The Pieces-
When two pieces of molding are being joined together in a run (end to end) leave the last two feet of the open end of the installed molding loose so you can have some alignment room when you join the next piece.

Finishing The Job-
Use Spackle to fill in nail holes and painters caulk on the edges between the molding and the wall and ceiling. Touch up these areas with paint.


uDecor, Inc. provides a LIMITED LIFETIME WARRANTY to the original purchaser of our polyurethane products. This LIMITED LIFETIME WARRANTY provides that the polyurethane material will be free from manufacturer defects in material and workmanship under normal and expected use. This warranty does not encompass all of the products sold by uDecor, Inc. and is exclusive to our polyurethane products only. Other products may carry their own manufactures warranty. Call us at 1-877-550-0600 for details.

uDecor, Inc. provides a LIMITED 5 YEAR WARRANTY to the original purchaser on the FINISH of our polyurethane products. This LIMITED WARRANTY provides that the FINISH on the polyurethane material will be free from finishing defects under normal and expected use for a period of five (5) years from the date of purchase. This warranty does not cover failure of a customer applied finishing system caused by material incompatibility.

  • Polyurethane products are for decorative use only
  • Primered products must be finished with an additional layer of finish paint. User is responsible to ensuring that the chosen finishing system is compatible with the primer/material.
  • Should be installed with non-corrosive fasteners and urethane approved adhesives in accordance with the installation instructions
  • Unprimed areas should not be exposed to UV light (sunlight)
  • Polyurethane products should not be installed in areas that experience ambient or surface temperatures above 140 degrees fahrenheit
  • Polyurethane products should be stored flat in normal ambient temperatures

If the material proves to be defective and has been installed and existed within the bounds of the above requirements, the customer should contact uDecor, Inc. in writing or by phone within 30 days of discovering the material defect. uDecor, Inc. may require digital images, a sample of the material or a combination of material and images to be sent to uDecor, Inc. for evaluation. Upon review of materials and installation methods, uDecor, Inc. will determine if replacement, repair or refund is appropriate. uDecor, Inc. is not liable for the cost of labor, transportation, or any other expenses incurred in conjunction with the purchase, use and installation of the material.

This limited warranty does not cover damage from the result of mishandling in transportation, acts of God, customer modifications, vandalism, misuse, abuse, improper maintenance, unreasonable care, or other causes that did not arise from manufacturer defects in workmanship and/or materials. No person or entity is authorized to change, modify, or amend the terms of this limited warranty in any manner.

This warranty gives you specific legal rights, and you may also have other rights which vary from state to state. This warranty applies to our polyurethane based materials only.

Contact: uDecor, Inc. • 8302 Espresso Drive, Suite 130 • Bakersfield, CA. 93312 • 877-550-0600 •

Allow 48 hours for the molding to acclimatize to the conditions where it will be installed

For more how to videos, visit our DIY learning center


27 Reviews

4.7 out of 5 stars
78%5 Stars
19%4 Stars
4%3 Stars
0%2 Stars
0%1 Stars
5 out of 5

Excellent Product

My carpenter painted them first and they look great up on the wall

Other products reviewed on this order: BB-9750 Baseboard Molding
4 out of 5

Great end result.

I'm an average DIY er. It took me a bit to get used to cutting the corners. Let's just say I had to fill some gaps. I am happy with the end result. I do wish udecor would have some guidance on compound saw settings for the typical 90 degree inside and outside corners. The product was easy to work with. There were some discrepancies in dimensions, but they lined up well for the most part.

3 out of 5

Inconsistent Milling

The finished side of the molding is great. Looks good and fits right, but the back of the molding is completely inconsistent from piece to piece which makes alignment for cuts, particularly miters, as well as alignment on the wall very difficult. The back of each piece should be either perfectly flat or have a consistently sized projection but not a mix of flat and multiple sizes of projections

5 out of 5

Great Product - Difficult Install

We ordered enough of this molding to do every room in our new 2br condo. It looks great and we love the U Decor product. One issue that came up for us - Crown molding is difficult to install because you cannot just cut the angle "flat" but you have to lay the crown onto your mitre saw using the back plate as the ceiling and the deck as the wall. But this was made more challenging for us because although our molding looked the same on it's face, the profile was different on about 1/3 of the pieces delivered to us. This required our molding guides to be reset for these peices, but we didn't realize that and couldn't figure out why our cuts were not working out. We finally figured it out but it was frustrating and it's something you should check out before trying to install. If you have any reservations about using "foam" instead of wood, don't worry. This material is great to work with, so much lighter than wood.. but REALLY REALLY Strong. at one point I dropped a hammer from ladder height onto the face of a piece of UDecor moding, and it didn't even make a dent. I'll never use wood molding again. I really like this product.

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5 out of 5

A great finish to a room

The trim came individually sleeved and arrived in just a few days after ordering. The product cut very smooth with no splintering with just a carbide tooth miter saw. Because of the "odd angle" - I would STRONGLY recommend using the MC-4190 corner blocks though - It made a possible miter nightmare into a simple straight cut. ( the only thing that wasn't available - that I was able to find i the website that would have helped was a matching outside corner block. - but since it was only one corner I was able to make it work with a little more effort. I did paint them using a Wagner sprayer and made for a very nice finish. I would definitely use this product again on future projects. I have 10 ft ceilings and this was perfect and not too overpowering but made a statement.

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Other products reviewed on this order: MC-4190 Corners
5 out of 5

Nice product, good instruction

I liked the videos available on your website showing how to install the molding.

5 out of 5

looks great

It was exactly what I expected. Very easy to work with, love the finished look. the only thing that could make it better would be longer lengths.

5 out of 5


Your entire process was easy and user friendly. I especially liked being able to get the samples before placing my order which was filled precisisly and in a timely manner. We could not be more pleased with this entire experience or the beautiful results.

5 out of 5

Remodel of kitchen

This crown molding was perfect for our application and looks amazing.

5 out of 5

Worked perfectly for my kitchen wonderful improvement.

Everything came in great condition, very helpful videos. Kitchen looks great.

5 out of 5

Great Product - Much Better Than Wood

We experimented with this polyurethane crown molding and are very happy. It has a flexibility that helps it fit onto walls that aren't quite flat. We like that we can so easily trim the molding to fit corners. When we started we used construction adhesive on the back but quickly abandoned that. It was too messy and brad nails easily did the job on their own. This stuff paints just like wood. After practicing, we found only about half of the pieces need a second coat. A pro could probably avoid second coats altogether. uDecor got our order to us (32 pieces) in two days which was impressive, and the price is very competitive. Overall a very positive experience and solid value. We'll be back for more.

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5 out of 5

Top Notch Product

Used in master bedroom and made a dramatic difference in appearance. Only disadvantage is limited lengths of product. Also do not take advise giving on video for butting edges. Should have know to angle cut as I always have in the past. Impossible to properly match when butting with wall and ceiling discrepancies.

5 out of 5

Great Company Great Products

I started using uDecor a little over a year ago and have never entertained using any other company since. Professional, friendly service, excellent shipping and great selection of products. I wish more companies used their business practices.

5 out of 5

looks great

Good product and even better customer service!

Other products reviewed on this order: BB-9769 Baseboard Molding
5 out of 5

Came out great

Great company to do business with. Excellent product to work with. A experience

5 out of 5

Easy Installation

Order arrived quickly and product exactly as advertised. I am by no means an experienced carpenter and the molding was easy to cut and install. Be sure to use a good miter saw. The MC-4190 corner pieces make it very easy to do the corners with no aggravating angled cuts to worry about.

Other products reviewed on this order: MC-4190 Corners
4 out of 5

A easy product to use

My overall opinion of this product is good. It is light weight making it easy to handle. It comes primed so if you're painting it white after it needs just a light coat. It cuts easily and cleanly with both a power saw or hand saw. I've withheld one star because there are slight variations in the shape of the moulding that is significant enough to be noticeable when butting two mouldings together. It makes it necessary to carefully choose moldings that will a butt. I'm surprised since these pieces are machine made.

5 out of 5

Fab product!

Second order so far. As a DIY'er I love the product! Easy to install. Super price. Great customer service. Don't know how but it was delivered within 24 hours of ordering! Will definitely order again. Thank you, UDecor!

5 out of 5


Excellent quality and unique design. We have a craftsman style house and I am excited to use this molding. What I loved about uDecor was I was able to order 7 samples and hold them up on my walls to see which one would work best. In the end we are going with this one. I have not yet worked with the material, however the sample is straight and well defined. I can't see any issues working with this product.

4 out of 5

Great deal

Product arrived promptly in great packaging. Highly recommend this company.

4 out of 5

Paul B.

This was a great experience the product came the next day The only draw back was I only need 2 pieces after buying about 13. The cost of the two, because of shipping, made them a little high but ok They called me to make sure I received them.This is great customer service!!

5 out of 5

Nice looking with class

It's flat and tall, just what I needed. Looks great and was way easer to work with than wood. Has some flex so the non-pro can fix an oops. My first time doing this so I made sample cuts. This gave me a picture on how to setup the saw. Tip, use a wide board on the saw table so the molding is always at the same angle to the fence. I made a face side plywood pattern of the molding as it should be installed. The plywood would rest on the ceiling and the wall so as to guide the molding at the correct angles as I installed it. Always over cut so you can fine tune the final install.

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Other products reviewed on this order: CM-1215 Crown Molding
5 out of 5

Professional look!

These items arrived in good order and very fast! The installation is easy and the look is exactly what we were looking for. A great product at better than competitive prices. Plus A customer service makes this company a definite go-to for all your crown molding needs. Thank you!!!

Other products reviewed on this order: MC-4190 Corners
5 out of 5

Great molding and even better company.

I have been purchasing contracting and interior design supplies for over 30 years and I have never had a better experience than uDecor - and that includes brick-and-mortar stores. From the instructional videos to the user-friendly website on through to the easy ordering process they have managed to make the online experience feel personal and driven by appreciation for their customers. If you have a question a friendly, knowledgeable person actually answers the phone! Oh yeah, and the molding is excellent, exactly as described and packaged for ease of use. I had the whole room installed in about an hour - including caulking.

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5 out of 5


This crown moulding has really enhanced the appearance of our house. It arrived quickly and in perfect condition. I highly recommend the product and dEcor. So happy with it!

4 out of 5

Great product

Exactly what it says. Good looking and lightweight. Knocked off one star because a few pieces had some small dents.

5 out of 5

Modern home --- clean lines of the molding set it off well.

We have our entire home fitted with U Decor. The molding has clean modern lines and sets our home off beautifully . The composition of the material makes for wonderful clean miters and joins. We love it and were pleased with the prompt feed back as soon as our orders were placed and deliveries in a fast and timely manner. Thoroughly recommended. the Company and their products.