Insulating Motor Housing

What is the problem?Motorbehuizing isoleren
Many vessels are equipped with a housing over the engine (for example sloops). The housing (also called casing) is usually made of material that is too lightweight, which means that not enough sound is retained. The housing is often made too small, which leaves too little space afterwards to install insulation and absorption material. There are solutions and products for this.

What is the solution?
The easiest way to insulate is to provide the inside of the housing with Merfocom. This combination plate consists of several layers and provides both insulation and absorption..

You can also put together products yourself to achieve optimal insulation for your situation. In any case, provide the inside of the casing with extra mass such as Isomat TS (the heavier, the better) and finish this with an absorption material of your choice.

Which product do I use where?
With less than 10 cm between the motor and the absorption material:

If there is more than 12 cm between the motor and the absorption material: 

  • Acousticcell PU, up to +80 °C, with oil- and moisture-tight toplayer.
  • Merfocell PU, up to +80 °C, with oil- and moisture-tight toplayer.
  • Flamex PU, tot +100 °C, equipped with an oil- and moisture-tight toplayer. 

Instead of combining products, you can also only use absorption material, for example in a renovation job.


Below you will find all described products for insulating the motor housing

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  1. PU Finishing Tape
    PU Finishing Tape
    To close gaps between sheets
    • For finishing gaps between two panels
    • Oil, dirt and moisture-proof top layer, heat-resistant
    • Easy to keep clean

    Starting at £18.17

    (incl. tax)
  2. Isomat TS
    Isomat TS
    Insulations for light materials/wood
    • Mass loaded vinyl
    • Sound insulating
    • For flat surfaces

    Starting at £26.15

    (incl. tax)
  3. Acousticcell PU
    Acousticcell PU
    Dirt-resistant absorption foam
    • Moisture and dirt repellent
    • Application including engine compartment
    • Hygienic areas

    Starting at £28.01

    (incl. tax)
  4. Flamex PU
    Flamex PU
    Dirt-resistant Absorption Panel
    • Melamine foam with PU top layer
    • Sound-absorbing panel with oil, moisture and dirt-resistant top layer
    • Equipped with adhesive

    Starting at £32.39

    (incl. tax)
  5. Merfocell PU
    Merfocell PU
    Sound absorption with a top layer
    • Oil and moisture resistant top layer
    • Sound absorption
    • Self adhesive

    Starting at £32.40

    (incl. tax)
  6. Flamex FC
    Flamex FC
    Absorption plate
    • Fiberglass cloth (FC) top layer
    • Heat-resistant Max. 150 degrees
    • For boats and vehicles

    Starting at £52.97

    (incl. tax)
  7. 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)
  8. Merfocom Combination
    Merfocom Combination
    Absorption and insulation board
    • Equipped with sound insulating barrier
    • Sound-absorbing and Sound-insulating
    • Equipped with an oil-resistant and fire-resistant top layer

    Starting at £106.36

    (incl. tax)
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Sound insulation for yacht and shipbuilding
More information about insulating yachts, ships and sloops can be found on the overview page 'Sound insulation and absorption for boat and yacht'.