Closed Cell Foam...is it all the same?

[konechiwa 10+ year member]

http://cgi.ebay.com/3-Minicell-Closed-Cell-Foam-Waterproof-1-8-1-4_W0QQitemZ260126521005QQihZ016QQcategoryZ41200QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

Will it work for sound deadening. Yes or no and why.

Thank you. //content.invisioncic.com/y282845/emoticons/veryhappy.gif.fec4fed33b4a1279cf10bdd45a039dae.gif

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