hum, I just wanted to share my 2cts, I prefer cascade vb2 on all my stereo installs. the showdown said this
"The Cascade VB2 is a completely different composition than the other mats. It held up very well, but I only included it in this showdown out of curiosity. Cascade has contacted me and will be sending samples of their butyl damping mat for future testing"
I have installed this material when i sell a car audio installs, they also have a good Waterproof Dampening Spray these are just what I have found to work and be affordable and the spray has high heat rejection.( put it on my sisters firewall which has a stainless racing header 1 1/2" away and she no longer feels the heat from it) once again this is just my 2 cents worth and I hope that if you are going to buy a product be sure that you have a good idea that it is made for your application. (also my in car decible level with the spray behind all doors and under the carpet on the top went down 17.3 db and my system increased 9.7 db). Thanks.....