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Car Insulation Guide to Automotive Insulation


Car Insulation: First Steps

If you are on this page you might have a question: why some cars are louder than others? What is the difference between a basic car and a luxury one? The answer is simple: luxury brands have high-quality sound deadening and insulation already installed while cheaper brands have a minimum of it or do not have it at all.

The fact is that all cars need insulation. If you’ve found your way to this page, it is more likely that your car has a problem:

1. Is your vehicle is too noisy or you hear rattles in the cabin and unwanted road noises?

2. An audio system in your vehicle is not delivering the type of sound you paid for?

3. You experience too much heat under your feet in your sports auto? Or perhaps the area under the bonnet gets overheated?

4. Your camper van getting too cold in winter and too hot in summer? 

5. You would like to convert your camper van as you planning to travel more?

Whether you’re dealing with noise or heat, we have the insulation for you to help you to get rid of the problems and get back to enjoying your journey.

Let's understand the different types of noise, where it is coming from, and how to minimize it in your van, car, or boat. Yes, there a few noise types and it is very important that every type would be treated with the right/specially designed for this specific noise insulation material. 

van insulation


Popular Car Insulation Materials

Different Types of Noises in Your Car

The source of the problem of increased noise is the vibrations of vehicle parts that occur during movement. Shocks of the suspension and shock absorbers, the bounce of plastic panels, fan noise - they all work in their own frequency range and create a certain sound background in the car. The bottom line: A long ride in a car with high noise levels leads to driver fatigue, which in turn negatively affects road safety. Most often, car sound insulation helps to solve this problem.

        Structural Noise: Primary noise comes from the engine, exhaust system, transmission, tires, etc. Secondary                            noise comes from metal body panels (floor, fenders, arches, doors, roof, etc.), plastic interior parts (dashboard,                          various linings, etc.), and small metal structures (power windows, rods drive locks, etc.).

        Structural noises penetrate into the vehicle interior through the suspension, transmission, chassis, and exhaust                          systems. Vibrations from these elements are transmitted to the vehicle floor and all body panels, which begin                              to emit structure-borne noise and reflected sound, further increasing the noise level. It is the property of a metal                          that conducts sound well and is the main problem when dealing with external noise. Installing soundproofing                              helps fight noise, regardless of its origin.

        Airborne Noise: From the word "air" - sound waves that penetrate your car's cabin from the outside air.

        Airborne noise penetrates the car interior through the glazing and existing body leaks (technological openings,                            doorways, etc.). At the same time, the noise level depends on the design features of the noise sources and the                          sound-insulating properties of glass and body panels (the thicker they are, the better they keep sound).



In the car interior, airborne noise from primary sources is generated, first of all, in the presence of "relatively open" spaces - technological holes, leaking gaps in doorways, gaps in body panels, and car glazing. The thickness of the glass and body panels of the car affects the noise level - the thicker the structural elements, the better the noise reduction.

High-quality design solutions used in the manufacture of a car (this concerns, first of all, the design of the engine itself, as well as the exhaust system and transmission) are already capable of effectively reducing the noise level.

As a result of structure-borne noise, virtually all body panels vibrate. This is considerable merit of the car's suspension elements, through which vibrations are transmitted, of the chassis, engine, and exhaust system. The latter, by the way, transmits a considerable part of airborne and structural noise through the floor of the car.

The acoustical properties of the car interior is a separately considered aspect of the formation of unwanted noise and sounds. The reflection of sound waves from parts in the interior of the car is of no small importance here. The quality of the road surface, as well as the quality of the tires themselves (the height of the tread pattern), make their own correction in the overall noise level of the car.


There are three noise-canceling methods, each with its role to play:

       Sound Deadening: reduces noise by stopping rattles, road noise, and vibrations (structural noise)

       Sound Blocking: blocks the transmission of unwanted sounds such as road, engine, and exhaust noise (airborne noise)

       Sound Absorbing: absorbs the energy of sound waves already inside the vehicle's cabin (airborne noise)

How Does Noise Get Into a Car?

The Best Car Sound Deadening Materials For The Boot, Roof and Doors

Soundproofing doors and wheel arches give quite good results: 

  • Street noise will be partially reduced;

  • Car acoustics will become louder and the bass will become more saturated;

  • The thermal insulation of the passenger compartment will improve: it will become warmer in the car in winter, and cooler in summer;

  • Creaks and extraneous sounds in the doors will disappear;

  • The doors will close softer and more pleasant to the ear. 

Soundproofing of the boot and the boot lid will ensure the following:

  • Rear tyres and road noise will be minimized as much as possible;

  • The sound of acoustics will improve, especially at low frequencies;

  • Squeaks in the cabin from the side of the boot will disappear;

  • Inside the cabin, it will be as warm as possible in winter and as cool as possible in summer.

Soundproofing the roof your vehicle and what are the benefits:

  • The rumbling noise from the roof when the car is moving disappears and the noise from the street is reduced;

  • The sound of acoustic systems is improved;

  • Minimizes the "drum roll" effect when it rains or hails;

  • Interior thermal insulation increases.

van insulation
van sound deadening
van insulation

PeaceMat XR Butyl Deadening Mats

dodo mat

Car Insulation's signature 2.3mm thick constraint layer damper (CLD). High-temperature butyl rubber adhesive mats engineered for performance



Great for:


silent coat

PeaceMat SR Deadening Mats

sound proofing

Car Insulation's Peacemat SR mats look exactly the same as Peacemat XR but it is thinner and lighter. Made of the same high-quality materials as PeaceMat XS but thinner 1.8mm


Great for:


sound proofing

Comparison Cart

PeaceMat XR

PeaceMat SR

Total Thickness



Foil Constrain Layer

black,annealed foil

black,annealed foil

Weight per Square Meter



Sheet Size

250 x 200mm

250 x 200mm

Cheap Fillers?






Peacemat XR and Peacemat XS are designed to do the same job, but Peacemat XR has 40% more of the butyl rubber. 

The primary differences are:


1. Performance: Peacemat XR deadens metal 30-50% better, depending on the application.

2. Weight: Peacemat XR weighs about half as much per square foot.


  • Doors (outer and inner door skins)

  • Floor

  • The firewall on the cabin or engine side

  • Trunk floor, walls, and lid

  • Roof

  • Hood (entire lid)


  • Generator boxes

  • Screen doors

  • Dishwasher enclosures

  • Sink tubs

  • HVAC ducts

  • Warehouse and hospital carts

What is Sound Deadening?

It is a mastic vibration-absorbing material that converts mechanical vibration energy into heat energy. In simple words, vibration dampers damp metal vibrations. This material is based on bitumen or butyl rubber. Some models can have an additional foil or paper layer imitating foil. Sound and vibration isolation begins with vibration dampers. They become the first layer of the "sandwich" of insulating materials.


Sound deadening is a way of making a car interior quiet, reduce rattles, road noise, and vibrations. This will increase the ride comfort by reducing noise, heat and improve the stereo sound quality. ... There are multiple types of sound-deadening materials, but they try to achieve two things: block noise and heat.

sound deadening

The Best Car Sound Deadening Materials For The Floor

Soundproofing only the doors, as well as the area of the wheel arches in your vehicle, isn't enough, you still will hear the sound of the engine during acceleration, as well as other sounds inside the cabin (creaks, noise from the suspension). Is it important to you?

If so, it will be necessary to consider soundproofing the floor, and the area of the bulkhead of the engine compartment. These body elements are the most important in terms of sound insulation.

If the reason you are here because you are tired of road or tire noise in your vehicle, you’re more likely require a noise barrier called MLV, to keep those unwanted noises outside of your car. Car Insulation UK uses the professional sound blocking material to create a barrier layer that acts as a wall between you and the noise, effectively turning your car into a soundproof booth. To get the best results, you need to first apply a sound deadening product (Peacemat XR) to reduce the amount of noise your car is creating, and then add the sound blocking layer (Peacemat XXL for example) to create a barrier to stop the noise. Additional car floor insulation, trunk insulation, and beefing up your car doors will create a bubble of protection.

This is the best material for automotive sound blocking in the market.

In addition to the above advantages, insulating the floor will provide the following:

  • Street and road noise will be significantly reduced;

  • The noise from the engine will decrease;

  • Thermal insulation will improve;

  • Your speaker system will sound even better.  

PeaceMat XX - 2in1 Mass Loaded Vinyl + Closed Cell Foam 

peacemat sound deadening
Screenshot 2020-08-18 at 14.17.45.png

Car Insulation's best noise blocker. By fusing the MLV to a decoupling layer of closed cell foam, Peacemat XX saves you time on the install and has our best STC rating



Great for:


PeaceMat L - 1.5mm Mass Loaded Vinyl 

sound proofing

Car Insulation's noise blocker. This product is thinner than Peacemat XX and perfect if you have a budget. 



Great for:


sound deadening

Comparison Cart

PeaceMat XX

PeaceMat L


Total Thickness



MLV + Foam

MLV Only 

Weight per Square Meter






STC Rating



Road Noise




  • Doors (between door skin and panel)

  • Floor

  • The firewall on the cabin side

  • Trunk floor, walls, and over the wheel wells

Residential/Commercial (PeaceMat L only)

  • Walls

  • Floors

  • Ceilings

  • Recording studios

  • Music rooms

  • Home theaters

What is MLV?

Mass Loaded Vinyl has been used for soundproofing since at least the 1960s.  It is essentially a viscoelastic material, such as polyvinylchloride (PVC, or vinyl), that is loaded with an inert material, such calcium carbonate or barium sulfate.  Viscous materials, such as honey, when subjected to a force, will flow and take on a different shape.  On the other hand, elastic materials, such as rubber, when subjected to a force will deform and snap back to their original shape. Viscoelastic materials exhibit both behaviours – they will flow, but when the force is removed or reversed, they will go back to their original shape.  This property, known as hysteresis (or damping), contributes to the ability of MLV to attenuate sound.  It is the mechanism by which many companies claim that MLV “converts sound to heat”, although it is not the fundamental means by which MLV attenuates sound.

Sound absorbers differ from sound insulators, as they do not reflect, but absorb sound waves. They are applied over or instead of soundproofing materials. They have a soft, highly porous structure and absorb up to 95% of sound waves.

Sound absorbers must be applied to the hood of the car. They are glued over a vibration absorber or a standard soundproof panel. In addition, noise absorbers are applied to the plastic door trim, dashboard elements. In these cases, the sound absorber can also act as an anti-squeak. 

Sound-absorbing materials are usually applied over the dampers. They are used to absorb sound waves due to their cellular and viscous structure. They are also used as an additional barrier to suppress vibrations. In addition, the sheets of noise absorbers are very easy to bend and are installed on parts of any shape. They are usually used in the cabin and in the boot.








      Car Insulation is very selective with the foams and jutes in our sound absorbing automotive insulation products.

  • Hydroweld - Used globally in pipe insulation and auditorium soundproofing. Hydrophobic insulation is particularly useful in cars, as it is water-resistant and has a high resistance to heat. Hydroweld is generally accepted as the highest quality solution for sound absorption in vehicles.

  • Absoft (25mm or 50mm thick) - Absoft is soft insulation and used for sound absorption in vans, cars, and even lofts. Absoft is available in 25mm or 50mm thickness. These high-quality sound-absorbing materials are plush and great natural insulators.

  • Closed-cell foam - Unlike open-cell foam, high-density closed-cell foam is impermeable to air and water-resistant, making it a good choice for adding heat insulation. Closed-cell foam is most effective when used as a decoupler between hard surfaces like rattling plastic panels.

camper van insulation

Hydroweld - 25mm Sound Absorber

Car Insulation's best sound absorber. This professional multi-layered product used by campervan converters all over the world. This soft, water-resistant, and fire-retardant sound absorber and insulator suitable for walls, roofs, and other parts of your van.  



  • Excellent fire resistance. 

  • Water resistant.    

  • Super sound-absorbing, soundproofing & insulation properties.

  • Lightweight and easy to install.


The Best Sound Absorbing Materials for Your Car


Absoft - 25mm or 50mm Sound Absorber

absoft insulation

Another, very efficient insulation product those who have a budget called Absoft. Absoft is popular because of it thickness and low price, it is also lightweight, a good sound absorber, an excellent insulator. Can be supplied with adhesive backing too, so no additional glue is required!


  • Fire resistant.      

  • Super sound-absorbing properties.

  • Lightweight, thick, and easy to install.


closed cell foam insulation

Car Insulation's CCF (Closed Cell Foam) can be used absolutely anywhere. The insulation normally combined with another layer for the best result. CCF from Car Insulation UK comes in different thicknesses and available in rolls up to 10m length. It is lightweight, self-adhesive and easy to apply.


  • Fire resistant.

  • Water resistant.      

  • Super sound-absorbing & insulation properties.

  • Lightweight, and easy to install.


Closed Cell Foam - 3mm, 6mm, 10mm, 20mm or 30mm Thick

Handyman on the Phone

Ready to Get Started?

Once you’re able to determine what kind of noise you’re experiencing in your car and which noise-cancellation method you need to use to eliminate it, all that’s left is to find a great product and get started. Car Insulation UK has you covered with every product you need to complete your automotive insulation project. Check out our online inventory and make it happen today!

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