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FatMat vs Dynamat: Which Sound Deadening Material Is Better?

FatMat vs Dynamat

Have you ever woken up one morning because of horrible road noise and construction?

Do the loud sounds of a busy highway or airport make it impossible to get a good night’s sleep?

Well, look no further as FatMat and Dynamat sound deadeners are your new best friends!

From doors and windows, floors and walls, and everything in between, these mats will give you the peace and quiet you deserve!

But which one should you get?

Let’s find out.

Table of Contents

Overview of FatMat Sound Deadener


Let’s take a look at FatMat’s notable features:

Quality Without the Extra Cost

Its asphalt-based soundproofing material delivers EXCELLENT sound isolation and EASILY BLOCKS annoying and irritating sounds from the outside.

But because the sound deadening materials used are asphalt-based and not rubber, it also does NOT make it heat resistant.

Works Best in Cold Environments

The adhesive tends to melt when the FatMat sound deadener is exposed to high temperatures. This will result in the sound deadening material falling off.

But if you live in a fairly cold environment, you won’t ever encounter this problem!

Uses of the FatMat Deadener

There are SO MANY places where you can install the FatMat, including:

  • Door panels
  • Soundproofing home theaters to boost bass and sound quality
  • Inside your car to block road noise
  • Home studios to enhance your sound system
  • To support existing soundproof materials in your space

Installation Process

Your FatMat sound deadener comes with self-adhesive tape, so all you need to get are some cleaning supplies, a measuring tape, and a sharp cutter.

Here’s how to install your FatMat sound deadener in 3 SIMPLE STEPS:

  • Step 1: Measure and Cut. Begin with measuring the surfaces where you will install the sound absorber and cut your sound deadener mat accordingly.
  • Step 2: Clean. Clean the surfaces with soapy water and a rag. Make sure you get all the grime and dirt out and dry the surfaces COMPLETELY before beginning the installation process!
  • Step 3: Install Your Sound Deadener. Since the FatMat is self-adhesive, all you have to do next is peel off the backing and stick it onto the dried surfaces. While installing, be careful not to let the soundproofing material stick to itself. The adhesive is very strong, and you WILL NOT be able to separate the mats if this happens! You will also need to use just the right amount of heat for it to stick properly.


  • Thinner sound-deadening materials make it EASIER TO INSTALL
  • SUPERIOR sound isolation


  • Asphalt based material gives off a slight odor
  • Adhesive tends to melt in high temperatures

Overview of Dynamat Sound Deadener


Now, let’s take a look at the Dynamat sound deadener and its noteworthy features:

No Asphalt Base

Unlike asphalt-based products, Dynamat’s Butyl-based material blocks unwanted noises and does an excellent job in heat resistance. It’s even considered as the best sound deadening material by some people!

Some users even install Dynamat to maintain the perfect heat temperature in their spaces!

First-Rate Sound Deadening

The Butyl rubber mat itself is STURDY and THICK and is coated with aluminum for EXTRA DURABILITY. This also makes it difficult to tear off easily.

And because the material is so thick, it aids in reducing internal vibrations or audio vibration distortion in your car too!

What’s more, is the Dynamat also boasts of superior noise-canceling powers that even partial coverage makes a HUGE difference in reducing noise — around 10dB to 20 dB!

Uses of Dynamat Sound Deadeners

Dynamat isn’t just excellent for car use, as there are a LOT of other places and ways you can use them:

  • Car soundproofing against road noise and enhancing car stereo
  • Deaden sound in home studios from outside noise and improve sound quality
  • Soundproofing nurseries and bedrooms from loud music, road noise, and other general noise
  • Professional studios to create the perfect audio environment

Installing Dynamat

The Dynamat installation process takes a little longer and will require more effort.

Here’s what you’ll need:

  • Roller
  • Adhesive
  • Measuring tape
  • A strong and sharp cutting tool
  • Soapy water and a cleaning cloth

You will buy your Dynamat will as a whole, which you will have to cut into pieces to fit into the parts of your car or room you will be installing it into.

Here’s how to do it step by step:

  • Step 1: Measure. First, use a measuring tape to measure the parts where you will install the sound deadening mat.
  • Step 2: Cut. After you’ve obtained the right measurements for each part, you can start cutting your sound deadening mats. Make sure to use a sharp cutting tool and put more strength in it so you can make accurate cuts on the thick mat.
  • Step 3: Clean. Like the FatMat installation process, clean the surfaces where you will install the sound deadener with soapy water and an old towel. Then wait for it to dry COMPLETELY before installing.
  • Step 4: Installing Dynamat. Next, grab some adhesive and a roller and apply them onto the dried surfaces. Then take your cut sound deadening material and stick it to the surfaces where you applied the adhesive. After that, wait for the adhesive to dry completely.

And you’re done!


  • HEAT resistant
  • It gives NO ODOR at all
  • SIMPLE and EASY installation process
  • FLEXIBLE material that won’t tear easily


  • On the pricier side
  • It takes more time and effort to install

Dynamat vs FatMat: Side-by-Side Comparison

Now let’s take a closer look at where the two mats differ:

1. Performance of Soundproofing Materials

The FATMAT has a thin asphalt base, making it easier to cut and faster to install:

  • A disadvantage of using this material is that it is not ideal for hot environments. The asphalt base material does not have heat-resistant properties, making it effective only in cold places.
  • And while neither gives off a strong smell, the asphalt used in the FatMat does give off a faint smell that might bother sensitive noses, unlike Dynamat, which gives no smell AT ALL.

Meanwhile, DYNAMAT is made of Butyl rubber, making it significantly thicker and bulkier than the FatMat:

  • The thick sound-deadening materials that Dynamat uses is great for soundproofing since it adds more mass.
  • Thanks to this thick material, the Dynamat acts as good thermal insulation, too!
  • On the other hand, the Dynamat is harder to cut and takes more work and time to install. So if you’re planning to cover every square foot of your whole cabin or whole car for soundproofing, you will need more effort to commit to the task.

2. Sound Quality

The FatMat is super popular for a reason when it comes to sound quality:

  • It is one of the best sound deadening materials in the market, and no other sound deadening product in its price range can beat its soundproofing performance.
  • FatMat’s overall quality is EXCELLENT, with a very minimal difference from the Dynamat sound deadening products.

But Dynamat isn’t behind the game either:

  • Its thickness and durability make it a strong choice for soundproofing!
  • Even professional studios and custom builders choose Dynamat for all their soundproofing needs.

When comparing Dynamat vs. FatMat, it is safe to say that both are equally great in this department!

3. Installation Process

First of all, FatMat is self-adhesive:

  • All the installation process requires is to measure, then cut the sound deadeners (which will be QUICK and EASY because the material is THIN), and stick!
  • Additionally, the FatMat’s adhesive is VERY STRONG that it can EASILY STICK to solid surfaces such as sheet metal.

On the other hand, the Dynamat installation process takes WAY longer:

  • You will also need to purchase additional equipment.
  • The Dynamat also does not come with its adhesive, so you will need to apply it yourself with a roller. And because the material is so thick, cutting it accurately into the right sizes will be harder.
  • Fortunately, Dynamat makes up for this by making made-to-measure packs available for sale! This is ideal if you have to do a lot of cutting for cars where shapes tend to be irregular.

That being said, FatMat wins this round of Dynamat vs. FatMat for its FASTER installment process!

4. Price

The Dynamat costs about $5 per square foot.

The price for FatMat VARIES, depending on how much you will be purchasing, but all of them are MUCH cheaper than the Dynamat.

For instance, if you purchase the FatMat in 100 square feet, you will only pay them $200. That’s LESS than half of the price you pay than if you buy Dynamat.

Obviously, you will be able to save money with FatMat. It delivers great value at such an affordable price.

However, users of Dynamat attest that apart from blocking noise so well, the Dynamat is very durable and sturdy that it can last you for years.

So despite its higher price, it is still a really good investment!

Frequently Asked Questions

To help you make a decision easier, let’s answer your remaining questions in comparing the FatMat vs. Dynamat!

How Much Does Dynamat Reduce Sound?

Full coverage of your car will reduce about 9dB to 18dB of noise.

A 10dB noise reduction means a 50% reduction of road noise, which makes a BIG difference, trust us!

What Thickness Is Best for a Sound Deadener?

When it comes to reducing and absorbing unwanted noise, the general rule is more mass means better sound deadening capacity.

The standard thickness followed by automotive sound deadening materials is 50 mm. If you need more, there are 80 mm and 100 mm options as well.

NOTE: Some may consider 100 mm to be unnecessarily thick and too heavy, while 80 mm is the middle ground. 

What Is a Cheaper Alternative to Dynamat?

FatMat is one of the top cheaper alternatives to Dynamat.

We’d suggest going for the FatMat if the price is a big deciding factor for you.

But if you prefer something different, HushMat and Noico noise-insulating mats are also one of the best Dynamat alternatives out there.

They are also quite popular in the market and will give you value for your money.

The Hushmat and Noico mat are also both Butyl-based if you prefer that instead of an asphalt base.

What Is FatMat Made Of?

The FatMat is made of 50 mil nominal rubberized compound.

Then, it is covered with a shiny, protective aluminum top and then a waxed paper release bottom.

Does Spray on a Sound Deadener Work?


Spraying is a good solution for hard-to-reach places or the little gaps where you can not install sound deadener mats.

However, these sprays are not a substitute for the mats.

Will Soundproofing My Car Be Worth It?


Although your car will not be 100% soundproof, it will significantly reduce outside noise and keep sounds in.

You can finally hear your music better and engage in conversation without having to project your voice!

The added sound insulation, comfort, and overall peace will also be well worth it.

Whether you use FatMat, HushMat, Dynamat, or Noico, we can’t recommend using these materials enough!

How Much Noise Will Be Reduced in My Car?

Your car or SUV, on average, will have a noise of around 70 to 74dB.

Installing your Dynamat or FatMat will reduce up to 4 to 5dB, which will be enough for you to talk to other passengers without having to raise your voices.

What Other Cleaning Solutions Can I Use for the Surfaces Before Installation?

Other than soapy water and a good scrubbing, you can also use rubbing alcohol, lacquer thinner, or even acetone to clean the areas where you will be installing the mats.

Where Should I Install My Sound Deadener Mats?

For best soundproofing performance, you should be installing your Dynamat or FatMat automotive sound deadener on your doors, trunk, roof, and floor.

How Much Sound Deadener Mat Coverage Will I Need for My Car?

For averagely sized cars, you will need about:

  • 12 sq ft for the inside door skin and 8 sq ft for the outside door skin. (This is good enough for 2 door panels.)
  • 20 sq ft for the trunk
  • 12 sq ft for your car’s roof
  • 72 sq ft for your vehicle’s floor

Do I Have to Cover the Entire Area With Soundproofing Material?

Not necessarily.

Of course, covering the entire area will give you the best results. But if you’re in a pinch, installing the mats on only 30% of a given area will make a noticeable difference!

You could start with this 30% and slowly cover the entire area as you see fit.

Final Verdict: Which Is the Better Sound Deadener — FatMat or Dynamat?

It depends on your priority.

If you are searching for the top quality, best in the industry sound deadener without worrying about the price or the hassle of the installation process, then DYNAMAT is the right choice for you.

Dynamat also wins if you don’t live in cold environments or are going for thermal insulation.


If you want to save money, live in a cold environment, and are bothered by installing Dynamat and pouring so much of your time and effort into it, then you should go for the FATMAT!

There is a notable difference in their soundproofing performance, but it is VERY minimal. Regardless, the quality you get is worth it!

At the end of the day, the battle of Dynamat vs. FatMat is dependent on QUALITY vs. VALUE.

Get Dynamat If:

  • You need the highest quality without compromise
  • You are willing to pay the price for it

Get FatMat If:

  • Value is your top priority
  • You don’t really mind the minuscule soundproofing difference that much


And that’s all we have!

We hope we were able to help you compare the two soundproofing products and pick which is the best vehicle sound deadener that suits your needs!

Rest assured that whichever you choose, you will be in good hands and enjoy the peaceful silence with both FatMat and Dynamat!

About the Author


Andrea has always been bombarded by the hustle and bustle outside her home. Living in the city doesn’t get any quieter. The never ending noise from construction, traffic, and dogs barking on the streets day in and day out drove Andrea to a breaking point.

For 3 years, Andrea committed herself to studying DIY hacks, performing soundproofing experiments, and installing noise-free solutions. Now, she lives a quiet life free of the stress from noisy environments.

She hopes to share this knowledge so that others don’t have to endure the noise reigning in their ears and live a peaceful, stress-free life.