Insulating the Bonnet

What is the problem?
A vehicle's engine radiates sound to the bonnet and bulkhead. In order to reduce this, the bonnet and bulkhead must be insulated, which is called anti-drumming. This reduces the gong sound in the sheet material by adding mass. The bonnet moves less after installing the acoustic insulation, making the vehicle quieter.

Insulating the bonnet
The best way to insulate a bonnet is to apply a combination of anti-drumming and absorption. The first layer of the insulation combination dampens the bonnet with STP Standartplast anti-drumming mats of the STP Black Silver. Then apply a layer of sound-absorbing material over the anti-drumming mats. Depending on the situation, you use Acusticab when there is sufficient space inbetween hot engine parts or Merfocell GW when there is insufficient space (less than 8 cm). Familiarise yourself with the operating temperature of the engine, the materials used must be sufficiently heat resistant and must not touch hot engine parts.

Engine in the cab
In some vehicles, the engine is located in the cabin. This is the case with a Peugeot J7 and a Mercedes 508, to name a few examples. The connection of the bonnet is very important to reduce the noise pollution of such engines. This must connect completely seamlessly and as tightly as possible (with, for example, compression fasteners) to the bottom plate. You can equip the inside of the bonnet with sound-absorbing material such as Merfocell GW. The outside of the bonnet can be completely equipped with Vibraflex Extreme or STP Aero Bomb. It is important that the plates fit properly together. Lastly, the bonnet can be finished with the insulating (floor) mat Isomat VM.


Below you will find all described products for insulating the hood

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  1. Acousticcell PU
    Acousticcell PU
    Dirt-resistant absorption foam
    • Moisture and dirt repellent
    • Application including engine compartment
    • Hygienic areas

    Starting at £28.01

    (incl. tax)
  2. Vibraflex Ontdreuning set
    Vibraflex
    Sound deadener sheets
    • Bitumen board with added mass
    • Sound deadening and sound insulation
    • High mass and self-adhesive

    Starting at £30.77

    (incl. tax)
  3. Acousticcell ALU
    Acousticcell ALU
    Absorption foam plate
    • PU foam with aluminium top layer
    • Oil, moisture and heat-resistant top layer, reinforced with fiberglass mesh.
    • Equipped with a sticker

    Starting at £33.70

    (incl. tax)
  4. Aluglass
    Aluglass
    Sound-absorbing sheet
    • Fiberglass mat with sturdy aluminium foil top layer
    • Sound-absorbing, heat-resistant panel
    • Good alternative to flammable foam products

    Starting at £51.13

    (incl. tax)
  5. Merfocell FC
    Merfocell FC
    Heat Resistant absorption
    • Glass fibre cloth (FC) top layer
    • Moisture and heat-resistant
    • Applicable in engine compartments

    Starting at £57.96

    (incl. tax)
  6. Isomat VM | Vloermat
    Isomat FM
    Sound-insulating floor mat
    • Plastic sheet with a resilient layer of PVC foam
    • Sound insulating
    • Suitable as a floor mat in, among other things, campers, trucks, tractors

    Starting at £60.24

    (incl. tax)
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Insulate vehicle
On our collection page Vehicle Insulation you will find more information about insulating various vehicle components such as bonnet insulation, wheel arch insulation and door insulation.