On the shelves of automobile stores there are a lot of soundproofing materials for the interior of the car. But what sound deadening for a car to choose? At the end of this material there is a rating of good sound deadening, which is universally used by domestic car enthusiasts. The list is not made for advertising purposes, but only on the basis of reviews and tests found on the Internet.

10 Top Car Sound Deadening

Mentions:sound deadening, butyl rubber, quarter panels, noise reduction, easy to cut
Mentions:adhesive, road noise, panel, dampening, value
Mentions:great value, huge difference, sound deadener, noticeable difference, make sure
Mentions:wheel wells, highly recommend, stainless steel, name brand, easy to use
Mentions:great product great price, easy to use, works good, easy to work, sticks well
Mentions:road noise, worked great, highly recommend, sound deadener, floor pan
Mentions:heat gun, center console, wear gloves, spare tire, make sure
Mentions:sound deadening, loaded vinyl, easy to apply, huge difference, sound deadener
Mentions:engine noise, aluminum, easy to cut, insulation, backing
Mentions:engine noise, highly recommend, area, insulation, foam

Buyer's Guide

What Sound Deadening for the car to choose? This question is asked by many car owners, who encounter significant noise in the cabin of their car while driving. There are several types of insulation materials that eliminate noise - noise-absorbing, noise-insulating and vibration-insulating. Which material is better - depends on the specific purpose. Usually, sound deadening materials are applied to the floor of the car, on the doors, on squeaky plastic products. To enhance the effect, in some cases, use a special liquid sound deadening, applied to the outer surface of the underbody and wheel arches of the car.

Why do You Need Sound Deadening?

In fact, the use of sound deadening materials makes sense even on a fairly expensive and high quality foreign cars, not to mention the budget domestic cars. There are three main reasons for this:

  1. Increased driving safety. Many people know that a prolonged unpleasant (and even louder) sound is deposited in the human subconscious, which leads to irritation of the nervous system. This, naturally, applies to the driver. If he constantly drives in conditions, when the unpleasant rumble is heard from the outside, the sounds of engines from passing cars can be heard, the plastic is constantly creaking inside the car - the driver begins to involuntarily distract from the driving process, which may lead to an accident on the road.
  2. Driving comfort. The reduction of noise in the car cabin leads to the fact that the driving in it becomes more comfortable. Fatigue is automatically reduced and the driver gets more pleasure from driving the car. The same reasoning holds true for passengers inside the car.
  3. Additional factors. These include, in particular, the protective function. Thus, sound deadening materials can protect the door surface and / or from mechanical damage and the emergence of corrosion centers on them. Also mentioned materials can stabilize the temperature inside the cabin. In particular, to keep the coolness from the air conditioner in summer and heat from the heater in winter.

But here we should add that you should not be too keen on increasing the degree of sound deadening. Otherwise, there is a risk not to hear the sound, signaling partial or complete failure of individual elements of the chassis, transmission, engine and other.

Therefore, good sound deadening should not be absolute. In addition, sound deadening adds a lot to the car, about 40-80 kg, and it already affects fuel consumption and acceleration of movement.

Another case when good vibration and sound deadening is used is the usage of good quality and powerful sound system inside the car. As for noise isolation, it is natural that while listening to music, extraneous sounds from the outside should not come into the cabin. It will be unpleasant for people around you to hear very loud music from the interior of your passing car.

As for the vibration isolation, it is needed, since during the operation of speakers the body of the car and its separate elements will vibrate, which can also cause unpleasant sounds. And the thicker (higher quality) the metal of the car body is the thicker the vibration isolation material is chosen for damping the vibration. Special expensive insulation materials are installed on the tuned cars with powerful audio systems.

Sound Deadening Materials

Three types of materials are used to accomplish the above tasks of sound deadening:

Vibration isolation. Usually performed on the basis of rubber rubber (similar to liquid rubber). The material is laid first, because its task is to damp the vibrations coming from the engine, suspension, transmission. They are called "vibroplast", "bimast", "isoplast".

Noise insulating. They, in turn, are divided into direct soundproofing and noise-absorbing. The task of the first - to reflect sound waves, not to let them get inside the cabin. The task of the second - to absorb and level these same sound waves. The material is the second layer. In stores, they are sold under the name "Bitoplast", "Madeline" or "Biplast".

Universal. They combine the functions of the above materials, and consist of two layers. Often it is universal sound deadening materials are used for noise isolation due to the fact that their installation is easier and faster. Their only disadvantage is the greater weight compared to the first two, which leads to increased fuel consumption.

What is the Best Sound Deadening for a Car?

The use of one or another material depends on the tasks set for them. For example, in some cases, the vibration isolation material is not laid in solid sheets, but only in strips. This reduces the effectiveness of its work, but reduces its mass, because in fact it is quite large. To do so or not - it's up to the car owner. As for soundproofing (sound-absorbing) materials, they must be laid in their entirety. Since the universal material cannot be divided into two layers, this leads to an increase in the total weight of the car.

As for the vibration isolation material, its large weight is due to the presence of bitumen in its composition. Remember that at full processing of the bottom, doors, wheel arches of the car body, its weight may increase by 50 ... 70 kilograms. Fuel consumption at this increases approximately by 2 ... 2,5 %. Dynamic characteristics of the car reduce at the same time - it accelerates worse, pulls uphill worse. If for cars with relatively powerful engines, it does not represent any special difficulties, but, for example, for urban small-capacity cars, it will be rather tangible factor.

How to choose Sound Deadening

The large selection of noise and vibration insulation materials makes us wonder how to choose the right sound deadening. Regardless of the brand, the car owner should always pay attention to the following factors of the offered goods:

  • Specific gravity. In theory, the larger it is, the better the insulating material is at dampening vibrations and sounds coming from it. However, in reality this is not always the case. Nowadays there are technological materials that dampen vibrations due to their technical characteristics, in particular flexibility and internal fiber structure. But you should not buy very light compositions, as their efficiency will be low. It is believed that the reinforced (aluminum) layer of the vibration isolation material should be at least 0.1 mm thick. Nevertheless, a large change in its thickness in the direction of increasing gives a small efficiency in terms of vibration isolation with a significant complication of installation and an increase in price.
  • Mechanical Loss Coefficient (MLC). This is a relative value that is measured as a percentage. In theory, the higher the value, the better. Usually it is around 10...50%. A similar value that characterizes the absorption of sound waves is called the sound loss coefficient (SLC). The logic here is similar. That is the higher this value is, the better. The range of the mentioned value for goods sold in stores is also in the region of 10...50%.

These two parameters are the key, and often decisive in the purchase of a particular vibration and sound deadening for cars. However, in addition to them you should also pay attention to the following additional factors:

  • Flexibility. This factor determines how well and tightly the material will adhere to the treated surface of the car body.
    Ease of installation. In particular, the choice of separate noise and vibration insulation materials or one universal. Also we are talking about additional tools and materials - construction hair dryer, roller and so on. The question of installation is also important in terms of economy. After all, if there is an opportunity to install the soundproofing material yourself - it will save money. Otherwise, you will have to use the services of appropriate craftsmen at the service station.
  • Durability. Naturally, the more impressive this indicator - the better. In this vein, it makes sense to read information in the manual about the warranty period. It is also worth asking the opinions of the car owners, who have already used this or that sound deadening for its durability.
  • Resistance to mechanical damage. Ideally, it should not change its properties, including shape, during the entire operation. However, usually the sound deadening is mounted in places where mechanical deformations are not afraid of it.
  • The thickness of the material. Depending on this, you can use different sound deadening not only for gluing large areas on the body, but also for processing small joints, for example, between rubbing plastic surfaces, which during friction emit an unpleasant squeak.
  • Quality of the mastic. In this case, it is not only about its vibration and sound deadening characteristics. Some cheap low-quality materials during installation, there is a situation where the mastic leaks from the sheet under the influence of hot air and spread over the treated surface. Such materials are better not to buy.
  • Value for money and quality. This factor is important, as well as when choosing any other product. If you plan to treat an inexpensive domestic car, exploited on bad roads - then there is no point in spending money on expensive insulation. And if we are talking about the treatment of foreign cars from the average price range, it is better to choose a more expensive and of higher quality material.

Adhesion is an important factor in the selection. According to the definition it is the adhesion of surfaces of heterogeneous solid and/or liquid bodies. In the case of adhesion, it refers to the force with which the insulating material is attached to the treated surface. Manufacturers indicate this value in the documentation, but some of them deliberately mislead car owners. The optimum adhesion value for attaching vibration and sound deadening is about 5...6 Newton per square centimeter. If the instructions indicate a value much higher than the mentioned value, it is most likely just a marketing ploy. In fact, the specified values are quite sufficient for quality attachment of the material.

Tips and advices on YouTube

The Secret to Turn a Normal Car into a Luxury Car - Sound Proofing