Insulation & sound deadener

[threedogs]

came across this product seems you get a fair bit for the $$$ asked.
Maybe those that have done it already would know better?
http://www.ebay.com.au/itm/Sound-Control-Heat-Insulation-Deadener-Mat-Ford-Foil-Aluminum-10M-x-1M-/301827376979?hash=item4646504753

[BigRAWesty]

That's what I used..
Mine was 10mm thick not 5..