being a stereo installer for 10 year we mainly used dynomat, but we also used hushmat, accumat and pretty much everything under the sun
a surplus store here in town had the tsunami silencer on sale for quite cheaper then what cost price was through the supplier, so i bought up all the stock the store had lol, shopping cart full was pretty heavy...
ond skin damplifier pro is the best ive ever used. and i have used a ton of different deadeners. they also have a thick brush on deadener. secondskinaudio.com. ill be doing a build log with it in a few
concrete is the best ,butttttttt i use either dynomatt ,or roadkill,they all are made with same composites ,or pretty close and most of them are effective ,depending on thickness ,and of course the vehicle itself