What to use for damping

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I live here in the Philippines and I can't find some of the damping material that has been recommended for my Half Chili project.

My choices are the following:
Bonded Foam - little chopped pieces of foam that have been bonded together. Probably the densest foam available.
Closed Cell Foam - what they use to stuff couches and mattresses
Open Cell Foam - very light...least dense

I remember seeing some polyfill batting before but didn't see them in the last store I went to.

What do you suggest I use and in what thickness?? Also, do I line all of the internal walls??
 
Buy some cheap pillows or cushions.
look for something that says: "Filling: 100% polyester"

Tease it out and tack handfuls on with a staple gun.
Start with one side and the back.

Another thing you can use is the recycled fluff mat from underneath the carpet in an automobile.
 
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