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Message: <blockquote data-quote="defcon1" data-source="post: 1856398" data-attributes="member: 30064">It should help a bit, but not much. I used to drive a Wira Aeroback and the only thing that would work is to layer with some thick insulation material.a) You definitely need bitumen of some kind to dampen the metal in the boot. Go to some old hardware shop and buy "flashing strips". Make sure good quality "Made in UK or Germany" stuff. Based on SAE standards, this material should only soften at about 80 degrees. Line the entire floor or any area with large metal surface. Especially pay attention to the front floorboards and the tyre wells.b) Go to air cond (building air-cond, not car air cond) spare parts shop and buy either Insuflex sheets or Insulon. The type I used is the non-adhesive type cos it costs about half the self-adhesive type. Use good rubber glue to fix onto metal. You only need to apply more on the non-horizontal surfaces. For the horizontal surfaces, a little on the corners and in the middle to hold it in place is enough.The bitumen doesn't really absorb sound. It absorbs the vibration energy and converts it to low frequency noise. The insuflex/insulon is designed to absorb lower frequency noise, but is transparent to higher frequencies. That's why a double layer (bitumen-insuflex) is neccesary.</blockquote>

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