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FM-5538 Flat Molding

3½" Height x 1" Width x 94½" Length
  • Quantity

    Per PieceThat's Only
  • 6-24

    $19.80$2.51 / foot
  • 25-49

    $18.30$2.32 / foot
  • 50-74

    $17.80$2.26 / foot
  • 75-99

    $17.30$2.20 / foot
  • 100+

    $16.80$2.13 / foot
  • Quantity
    6 minimum Need less?
6 pieces = $118.80 / 47 linear feet
  • Order a 10" Sample ($3.00)

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  • TypeCasing & Chair Rail

  • StylePlain

  • ColorWhite Primer

  • MaterialPolyurethane

  • Height3-1/2"

  • Width1"

  • Length94-1/2"


  • Product Video Placeholder Image
    Product Video
  • Product Video
    What is Architectural Polyurethane?

Product Description

Quick Facts

  • Made from dense durable Polyurethane
  • Lasts a lifetime
  • Mold and mildew resistant
  • Flexible yet strong
  • Lightweight and easy to install
  • Sandable
  • Safe to install indoors or out

The FM-5538 Flat Molding is a plain molding typically used for chair rail & casing or door & window trim. The molding is 3-1/2" tall and protrudes out 1".

uDecor 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 will not expand, contract or warp over time with changes in humidity. It's 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.

When planning for chair rail or other molding, inspect the walls and/or ceiling to see if any vents or other objects are within the footprint of the moldings.

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 from 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.

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)

For more how to videos, visit our DIY learning center



4.9 out of 5 stars
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Innocenzo C.Astoria, NYJuly 10, 2023

4 out of 5

Huge improvement

I have had my challenges since I am not a carpenter . The more corners and joints I had to do the better I became at it . The product I really nice to work with , it's super light , easy to take down if you need to. No issues with cutting it. I have an 8' ceiling and am not finished yet since I am doing other molding projects on the wall . Very happy with the purchase , Also shipping is very quick .

Robert N.Stilwell, KSJanuary 25, 2022

5 out of 5

Awesome Product

We have been using uDecor molding products for two basement finishing projects and found the moldings to be an excellent choice. The material is light weight and easy to cut and paint. It has a rich finish to it, better than any box store product you can by. Family and friends say it looks great.

Mark B.Savannah, GAOctober 13, 2021

5 out of 5

Buy it

Absolutely stunning, easy to install and paint. Great price. People that visit notice and comment on the beauty it adds to the room

Beth H.Dallas, GASeptember 23, 2021

5 out of 5

Perfect addition

We used the egg and dart crown molding with this, and the result is lovely!

Oliver T.New York, NYJune 12, 2021

5 out of 5

Perfect window casing

A great size, with enough impact around windows to make them stand out.

Dwayne M.S Vineland, NJJune 8, 2021

5 out of 5

Looks great

This product adds great details and elegance to our home

Mark L.Bal Harbour, FLDecember 6, 2018

5 out of 5

Everything worked well

Good quality and prompt shipment When item needed to be returned due to over ordering it was handled professionally and credit for returned goods issued promptly

Lynda K.Chandler, AZMarch 10, 2016

5 out of 5

Loved it

Our dinning room looks great after installing our new molding