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Internet # 324588989

Model # 0265282

Store SKU # 1009234431

300 sq. ft. 4 ft. x 75 ft. x 0.08 in. Premium Underlayment for Laminate, Hardwood and Engineered Floors

66¢ /sq. ft.
Covers 300 sq. ft.
$196.65 /roll
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Product Details
  • Improves acoustical performance
  • Moisture barrier
  • Value Size
About This Product

It's what's underneath that counts! FloorMuffler UltraSeal is the original high performance acoustical underlayment that has led the industry for over 20 years. As a premium grade underlayment, FloorMuffler UltraSeal uses its closed cell polypropylene foam construction and UltraSeal self-sealing lip and tape system to form a moisture barrier. FloorMuffler UltraSeal is the ideal choice for most Laminate, Engineered and Solid hardwood flooring applications and can be used for Floating, Nail Down, and Double Glue Down installations. FloorMuffler UltraSeal is designed for both residential and commercial projects. The value size roll of FloorMuffler UltraSeal is perfect for remodeling larger rooms.

  • For use with Laminate, Engineered, Solid Hardwood and Rigid Core (5mm or thicker) flooring systems, in Floating, Nail Down, and Double Glue Down applications.
  • ACOUSTICAL PERFORMANCE: Highest acoustic ratings on the market: HIIC up to 76, IIC up to 74 dB, STC up to 73 dB, Delta IIC up to 25 dB.
  • MOISTURE PROTECTION: All-in-one moisture barrier means no additional films required. UltraSeal lip & tape system joins rolls at the seams to ensure moisture protection.
  • ECO-FRIENDLY: Surpasses the indoor air quality emissions requirement for California's Section 01350-the most stringent volatile organic compound (VOC) emissions standard in North America. Mold and Mildew Resistant and recyclable.
  • PEACE OF MIND: Limited Lifetime Warranty
  • AROUND THE GLOBE: FloorMuffler has become the industry's most trusted brand of underlayments with millions of square feet installed in residential and commercial applications around the world.
  • Return Policy
Product ID #: 324588989Internet #: 851312004824Model #: 0265282



Area Coverage Per Roll (sq. ft. for each roll)300Product thickness (mil)2
Recommended overlap (in.)0Roll Length (ft.)75 ft
Roll width (in.)48


Color FamilyRedCommercial / ResidentialCommercial / Residential
Flooring Material FeaturesAntimicrobial, Cushioning, Moisture resistant, Mold/mildew resistant, Radiant heat, Sound absorbingFlooring Product TypeUnderlayment
Flooring TypeEngineered Hardwood, Laminate, Solid HardwoodLocationFloor
MaterialFoamNumber of Rolls Included1
Package coverage (sq. ft.)300Returnable90-Day
Subflooring typeAny

Warranty / Certifications

Manufacturer WarrantyLimited Lifetime Warranty

Questions & Answers

Q:What is the r-value
by|Feb 20, 2024
1 Answer
Answer This Question

A:  Hello. The R-Value for FloorMuffler UltraSeal is 4.3 Ft² - F - Hr / BTU

by|Feb 20, 2024
    Q:Can you use with LVP
    by|Feb 8, 2024
    1 Answer
    Answer This Question

    A:  Hello Bill. FloorMuffler offers a different product for LVP flooring. FloorMuffler Encore, which is also available on The Home Depot's website, is designed for vinyl plank, rigid core and other attached pad flooring. This is the gray FloorMuffler underlayment on Home Depot's website. The red product is not designed for LVP flooring.

    by|Feb 8, 2024
      Q:Would this product be recommended for use under LifeProof Waterproof Hybrid Resilient Flooring, which is not exactly a laminate and not exactly LV? https://www.homedepot.com/p/Lifeproof-Lovington-Oak- If not this product, what would you recommend using?
      by|Jan 10, 2024
      1 Answer
      Answer This Question

      A:  Hello. FloorMuffler Encore would be the recommended underlayment for LifeProof's Hybrid Resilient Flooring. It is the gray FloorMuffler underlayment, and it is also available at The Home Depot.

      by|Jan 12, 2024
        Q:Why shouldn’t I use UltraSeal over the Encore product for a 6.5 mm rigid core vinyl plank with attached pad installation? It is thicker, cheaper, and has better acoustical ratings.
        by|Nov 28, 2023
        1 Answer
        Answer This Question

        A:  Hello. FloorMuffler Encore is the recommended product for use with attached pad flooring, because FloorMuffler Encore is a higher density product. This high density layer will help support the floor's locking system. On the Home Depot's product page for FloorMuffler Encore, please see the document labeled "Specification" that shows durability testing for FloorMuffler Encore with attached pad flooring.

        by|Dec 8, 2023
          Showing 1-4 of 209

          Customer Reviews

          4.4 out of 5
          • 4.4 out of 1,084 reviews
          • 82% recommend this product
          Filter by:
          Showing 1-10 of 1,084 reviews
          Great product
          I've used this as underlayment for several hardwood floors now and it's great, I like the fact that it's both a sound deadener and a vapor barrier all in one. The design of the foam allows you to easily secure one strip to the other, so they don't slide all around while you're installing the floor. I've had no issues with squeaks or hollow sounding floors while using this, I will continue to use it for every project I do. In mind if you use this product, you can no longer glue down your floors
            • Recommended
            Great multipurpose underlayment
            I use Floor Muffler is an underlayment for laminate flooring. The material is a soft foam with medium density. There's a little cushioning to it, but it's not too soft. It reminds me of the same material that's used on laminate flooring with attached underlayment. This underlayment is also a vapor barrier, so you don't need to install a separate product, which saves time and cost. The edge has an adhesive that attaches to the next layer of underlayment. This not only keeps the underlayment aligned when I'm working on the flooring, but it also is what makes it a vapor barrier. I've used different types of underlayment and this is one of the better products. It is more durable and doesn't tear easily. Also, it does a better job cushioning the floor and keeping things quieter. The roll comes in a 4 foot wide x 75 feet long dimension. I highly recommend Floor Muffler and I give it five stars.
            • Recommended
            Meticulous to install but seems to work fairly well. Very pricey though.
              good product
              FloorMuffler 300 sq. ft. 4 ft. x 75 ft. x 0.08 in. Premium Underlayment for Laminate, Hardwood and Engineered Floors I used this underlayment over 3/4" old oak hard wood floor (on second floor) and under 3/4"x2.5" Solid red oak floor (I did not like different looks). The building is about 80 year old solid red oak, amazingly the old floors have held up over time. As expected they are pretty creaky and get very cold with the weather. I got one advice from an old guy to spread the baby powder over the old floor and work it out in the seams of old floor to get rid of the squeaks. For this new floor I wanted to bring as much insulation and noise reduction as possible. The floor is now installed and it feels warmer and more solid, the noise is also a consistent noise throughout and the squeaks are gone. The install itself was easy. I would purchase again.
              • Recommended
              5 found this review helpful
              High quality.
              i needed to replace some laminate flooring and i wanted new underlayment. the underlayment used by the contractor was paper thin and on top of a cement floor. the floor felt very hard. this floor muffler underlayment is a little padded so i ordered it. it arrived in three days and in new condition. it is much higher quality the contractor used and is is thicker, this is perfect for a concrete floor, i am very happy.
              • Recommended
              Super product
              This is a super easy to use product that works great. I tried putting a floor down without the underlayment, and it did not go well for me. Definitely worth the extra time and money, which is about the only complaint about this product. At the price, you will want to measure correctly because you will not want to buy another roll for a small section. Follow the directions and you will not be disappointed.
              • Recommended
              Multi purpose barrier
              This FloorMuffler underlayment provides noise suppression, a slight thermal insulation and a full moisture barrier. The nice feature to insure continuous moisture barrier without overlapping the foam itself is a folded flap of plastic sheeting that you unfold to bridge the gap between strips of foam. There is also an adhesive strip to hold your starter course in place and to connect between foam strips as needed. It tends to curl a bit but the adhesive does a decent job holding the end in place. Be careful walking on it as you lay flooring and you’ll wind up with a nice job! I’d recommend testing a couple small strips to get a feel for the adhesive and positioning.
              • Recommended
              Nice light-weight underflooring
              This roll looks much heavier than it actually is. When it was delivered, I expected 20 - 30 pounds at least. The roll might weigh one pound. Very light weight, but looks to be made of a material that will withstand pressure and use. I am using it underneath a laminate flooring that has a cork-like backing to it. I need it more for the tiny bit of extra height, and less for the sound deadening, but I believe it will cure both ills. Also, my floor boards tend to be creaky in my house, so after i throw a few screws in the sub-flooring, I'm hoping that this helps. At the very least, it should make for a quieter upstairs room.
              • Recommended
              A high-end superb product, Floor Muffler's UltraSeal is the original high performance acoustical underlayment leading the industry for over 20 years.
              A high-end superb product, Floor Muffler's UltraSeal is the original high performance acoustical underlayment that has led the industry for over 20 years. Yes, you can lay flooring directly on the sub-floor material, but the better your underlayment, the better your satisfaction and performance of the top wood floor product. This closed cell polypropylene foam product comes with an integrated self-sealing tapered lip and tape system to attach pieces together. Do read the manufacturer’s instructions first! They state to install the pad at 90 degrees to your flooring; to install the tape system at the subfloor; and to verify your adhesive will work with this pad - among other things. Residential and commercial use is approved. Laminate, engines and solid hardwood are approved. As an installer for many decades, your underlayment for carpet or wood truly makes a difference in comfort, in sound absorption and in durability. It is worth the price to get a quality product that will achieve these ends. Overall, this is an excellent product that will do what it says for a long time. Do use their chart to determine how much you need for your project.
              • Recommended
              High Acoustical floor muffler
              FloorMuffler has been in business for over 20 years and is currently leading the industry with its high performance acoustical underlayment which serves as a premium grade. It is made of closed cell polypropylene foam construction and ultra sealing lip and tape system. It serves as a moisture barrier and is ideal for most Laminates, Engineered and Solid hardwood flooring applications. Its features are anti microbial, cushioning, moisture resistance, mold and mildew resistant, radiant heat, and sound absorbing. It is sold in different sizes from 100 to 3600 sf
              • Recommended
              Showing 1-10 of 1,084 reviews

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