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Sound deadener sheets

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Vibraflex is a bitumen damping sheet, also known as sound deadener, an insulation product for isolating resonances in sheet materials such as steel and aluminium. The material is made of bitumen and self-adhesive. Due to the high damping and favourable price-quality ratio, the product is very popular among restorers of classic cars and car audio enthusiast.

More information
Variant SKU Dimensions (mm) Color Price incl. tax Stock Qty m2
Normal M0084 1000 x 1000 x 2,5 Black
44 pcs
Extreme M0085 1250 x 500 x 4 Black
58 pcs
(excl. tax: £0.00)

Suitable for:
Aniti-drumming (reducing the gong effect) of aluminium, steel and plastic. Adding mass increases the insulation values.

Less suitable for:
Steel thicker than 4 mm. Temperatures higher than ± 70 degrees (do not apply under a bonnet).

Volume discount

Package contents

  • Vibraflex Normal
    8 sheets of 500 x 250 x 2.5 mm (1 m²). Weight: 5 kg.
  • Vibraflex Extreme
    5 sheets of 500 x 250 x 4 mm (0.63 m²). Weight: 4.8kg.

How much do I need for good sound attenuation?
In order to properly dampen (insulate) sheet metal, the mass of the surface to be insulated must be at least doubled. To effectively isolate sound and resonances, provide at least 70% of the surface with sound deadening material. For applications in vehicles, for example the underbody, it is better to provide the entire surface with sound deadening. This is because there is often contact and airborne noise here.

What it is and does:
Vibraflex is a set of sound deadening and sound insulation panels especially intended to remove the gong effect in sheet materials such as steel, aluminium and plastic. Vibraflex used in the applications for which it is intended and worked correctly takes, as it were, a tight hold of the sheet material to prevent resonances passing through the sheet. This in turn eliminates the gong effect.

Which type do I use where?
There are two types of Vibraflex available in boxes cut into handy and easy to use mats. Vibraflex Extreme and Normal. You apply this product in the following places/ways.

  • Vibraflex Normal
    This variant weighs 5 kg/m² and is used on vertical parts of thin sheet material (steel, aluminium or plastic). For example in doors and against side panels. This type can also be used in steel housings and equipment housings of a steel thickness of up to approx. 1.5 mm.
  • Vibraflex Extreme
    This variant weighs 8 kg/m² and is used on slightly angled and horizontal parts (meaning flat) such as the bodywork, floor, bulkhead and wheel arches. This type can be applied to a sheet thickness of up to approx. 3 mm.


  • Sound deadening and soundproofing.
  • Fire class E according to EN 13501-1.
  • Specially cut into handy sheets.
  • Supple (after heating).
  • Self-adhesive

Assembly Tips
Make sure that the surface to be insulated is clean and degreased. Vibraflex is best processed at room temperature or just above. You can use a paint stripper or hair dryer to heat the material and make it more flexible. Do not make the Vibraflex too hot, the material must be able to be processed with bare hands. Avoid air bubbles between the Vibraflex and the surface. These cavities can fill with moisture, causing rust to form. Use our Vibraflex Pressure Roller to easily apply the material and mould it perfectly to the substrate.

On the Acoustic Shop YouTube channel you will find instruction videos of various insulation work.

Free product sample
See the quality of our product for yourself and request a free sample. Fill in the Contact form with your address details and we will send you a product sample as soon as possible.


More Information
Length 500
Width 250
Description Set
Color Black

Akoestiekwinkel is part of Merford, which has specialized in sound and noise control in construction and industry for over 35 years. By listening to our customers' problems, together with our years of expertise, we can provide the right advice for controlling noise in vehicles, boats and yachts, homes and studios. On our website we share this knowledge and guide you to the right solution.

the advantages of Acousticshop

  • Great expertise, the right advice

  • Reliable quality

  • Fast delivery time

  • Extensive range

  • Over 40 years of experience

  • Solutions for business & private use

  • Come visit us in our Acoustics shop

    Akoestiekwinkel is since 2004 the specialist in solving noise problems of consumers (in the Netherlands and Belgium). Our goal is to create a comfortable living environment by controlling annoying and harmful noise. The experience of sound is subjective. We want to make sound pleasant. In one situation this means as little sound as possible, preferably total silence. In the other case, good acoustics to make music sound optimal, for example.

    We have an extensive range of solutions in the area of sound insulation and acoustics that are available from stock. Quality comes first. Our products are extensively tested and certified. Their performance is proven and easy to compare with other products. Our range is continuously expanded with new solutions.

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Sound deadener sheets

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