Vehicle Undercoating For Noise Reduction – The 2 That Works Best?

If you own a vehicle, then you will attest to the fact that despite the convenience and service it offers, it is also not short of a few challenges; and one of them can be a specific noise. Have you ever heard that something so simple as using certain types of undercoating can drastically reduce road noise invading the cabin?

Does Undercoating Reduce Road Noise? Certain types of undercoating do drastically reduce road noise. The type of undercoating that works best for noise reduction is the undercoating made of a rubberized compound that does not crack or brittle over time.

To get a better understanding of the undercoating process, a vehicle for noise reduction here is everything that you need to know regarding this type of process.



Benefits from Undercoating a Vehicle for Noise?

In essence, undercoating is a remarkable solution for noise reduction. Usually, when you are in need to inhibit the corrosion effects before it even begins, a vehicle undercoat is what you ought to do. Why? With vehicle undercoating, it offers a protective rubberized coating to vehicle areas that experience substantial damage and weathering.

Moreover, it acts as a barrier against moisture, rust, and abrasion, salt, and even prevents damage. It is installing a form of’ physical barrier between your car’s exposed underbody and the road debris, grimes, salt, etc.

How Does Rubberized Undercoating Work For Noise Reduction?

Undoubtedly, spraying an undercoating (rubberized) on your vehicle will significantly reduce the noise. Nonetheless, there is a need to do it as expected. Many individuals define it as the best solution to fixing unwanted noise issues on a car. And if it as useful as many car owners claim it to be, how good is it? Now that we now know what it is, let’s see exactly how it works.

Undercoating your vehicle reduces the noise emanating from either your engine or the road. This is mainly since it is applied to the exposed parts of the car like the underbody and the wheels well. The process prevents the contact between debris and as well as the metal-hence less irritating noise!
Vehicle undercoating is estimated to prevent about 5 dB of loudness or even more, hence the reason most drivers find their car interiors visibly quieter than before getting an undercoating done.

Types of Vehicle Undercoating For Noise Reduction

While having your car undercoating done professionally can be quite a pricey affair, fortunately, if you are on a tight budget, you can just work on it yourself for a relatively cheaper cost. Below are several types of undercoating for an afternoon DIY job.

1. Rubberized Undercoating:

Easy to apply and besides offering sound-cushioning, it also protects against moisture, dust, dents or dings. Moreover, in addition to fixing your undercarriage, this type of undercoating is safe for use on quarter panels and wheel wells.
It also creates a soft rubbery finish which prevents further damage, rust, or even moisture seeps.

2. Polyurethane Undercoating:

This method involves the usage of polyurethane-based sealant. It is easier to apply and relatively quicker. The undercoating seeps into all seams and cracks displacing moisture and salt, and oozing around any rusty parts to not only bond but protect the un-oxidized metal.

3. Wax or Paraffin-Based Undercoating:

This is the quickest and cheapest available option. However, it wears off faster and will need an occasional reapplication.

4. Asphalt-Based Undercoating:

For any standard car, any of the types mentioned above will offer adequate protection. However, for heavy machinery and large trucks, this type of undercoating offers an added durability against chips, rocks, or even moisture.

It features a little more of rubberized material which sets up rather firmly on your vehicle. One of the most popular as well as effective asphalt-based undercoating products is the Rust-Oleum Undercoating.

This is an easy to apply type of asphalt-based coating which helps in the prevention of undercarriage damage resulting from rust, scratches, and weather.

In particular, the Professional Grade Undercoating affords superior corrosion resistance and of course sound deadening benefits, not to mention drying faster on application.

Picking the right type of vehicle undercoating is a massive step towards protecting the damage of your car due to various external elements as well as help in the prevention of further decay or even rust.

Tips For Applying Sound Deadening Vehicle Undercoating

Undercoat Sound Deadening

Undercoating a vehicle can either be done by taking your car to a professional car workshop, or by doing it on your own.

In case you decide to go to a professional workshop, you will not have to follow through these basics as the available experts will do it for you.
One of the best workshops for vehicle undercoating services is Ziebart Auto-shop (credit), known for their quality, and durable sound deadener services.
Ziebart sound deadeners are an effective option as they increase the barrier between your vehicle and the road. What’s more, besides soundproofing, adding sound deadeners also protects your vehicle’s undercarriage.
On application, sound deadener reduces noise, not to mention covering critical areas which are otherwise exposed to various harmful materials. This coating prevents chemicals, moisture, and salt from getting to the metal components of your vehicle and ultimately damaging it.

For the best results, Ziebart Sound Barrier can help cut down the noise from your vehicle’s undercarriage to about 60%, although it is dependent on both the car type and model. Approximately 4x thicker compared to undercoating, Ziebart is an insulated protection layer which minimized noise while simultaneously offering your vehicle a defense boost. However, If you do it on your own, the process involves two distinct phases:

1. Preparatory Stage:

This is a significantly important phase mainly since it is all about dealing with your greatest hindrances, mainly moisture and dirt.

Before you can start doing anything, your first step should be to put your car’s handbrake, to prevent your car from rolling off while you are at it.

If you opt to do it alone, you need to elevate your car by use of a jack and leave it resting on the jack stands. However, in case you opt to take your vehicle to a workshop, they own machines that can lift your vehicle high up, allowing them to do the work while standing.

Lastly, you need also to remove the wheels of your vehicle starting the job.

2. Cleaning of the vehicle’s Underside:

One of the first steps before starting on anything is to get rid of the rust and dirt. You can do this by first scrubbing your vehicle’s underside as well as its wheel rims using water and soap.

Next, you can hose everything down using water and repeat this if need be.

What’s more, you need to scrape away whatever rust deposits which may have accumulated. You can make use of a rust remover. Using rust remover is quite a time saver and is reasonably cheap.
After all that, you should now have a clean, but wet car underside. Dry it using a towel, blow dryer, or simply allow it to sit outside just for a few hours.

How to Undercoat Your Vehicle for Soundproofing

After finishing on the steps above, the next step is to undercoat your vehicle finally. Start slowly and ensure you don’t miss any spots whatsoever. After all, isn’t the primary motive to get the maximum effects?
Furthermore, afford it adequate time to set. This can usually take even a day. You should note, however, that the time you afford it to allow proper setting will generally depend on the climate.
Most undercoating is typically applied using a spray gun. Generally, disposable spray guns are the best since after the undercoating hardens, cleaning the gun becomes quite a challenge even when using a generous amount of thinner.
Lastly, no matter the type of car undercoating you are using, always go for two coats for maximum efficiency. Be sure to afford ample time between the coats to allow proper drying.

Best Underbody Sound Deadener

When looking for the best vehicle undercoat, there are various factors that you should consider, including quality, cost, soundproofing effectiveness, and the option to utilize it on varying car types.
One of the most preferred choices and arguably the most effective vehicle undercoat is the 3M Professional Grade Rubberized Undercoating 03584. Click here for the current price on Amazon.
This is a rubberized undercoating which is not only popular for its remarkable noise reduction efficacy, but for its ability to safeguard a vehicle’s undercarriage from abrasion and corrosion. It is created to help cut down deadening noise facilitating for a more quieter and pleasant ride.
Another great choice of best underbody sound deadeners is the Al’s Liner  Premium DIY Rubberized Undercoating (Amazon). You would need a spray applicator to apply this soundproofing undercoat for your car, however.
One thing that’s for sure with Al’s rubberized undercoating is that you won’t need to reapply for many years, if ever. Just make sure the underneath of the vehicle is clean and dry for best results.
Click the link If you need more advice on vehicle sound deadening products we recommend!

Car Undercoating NoiseReduction Alternatives

While undercoating sprays reduce noise from your vehicle significantly, there are, however other similarly useful techniques and options available. Some of the most effective alternatives to undercoating include:
• Replacement of all the rubber seals panel.
Also, check out our other vehicle soundproofing articles that will certainly help you achieve your soundproofing goals!


Does undercoating your vehicle reduce road noise in the vehicle? The answer is a frank YES. Undercoating a vehicle will make all the difference.
By reducing least about 5 dB (decibels), and probably more than that, this is a great, cost-effective solution to the reduction of noise. Besides this, regular vehicle undercoating will also ensure that your vehicle undercarriage is protected from rust.
Try it Out!

Recent Posts

%d bloggers like this: