Car audio??????

[BEISSEN]

Ok i amlooking to get ready to start an audio upgrade possiably woth two 12's in my trunk and two 10's i my back rear fender wells.I am wondering if any one has heard of or even used damping material from cascade audio.I am looking at their vblok and vb-5 damping material.There is a paste like material that can be applied by spreader and some that has to be put on by sheets.I was wondering if someone can tell me so info on this stuff or should i just stick with dynamat extreme which cost alot more.Everything will be custom made to fit in my trunk and my rear.If shark0728"?" reads this can you give some pointers.

[Anubis]

I use bondo spray on insulator and rust preventer in my car, as well as dynamating the entire thing. its so quiet i could hear a pin drop....ok maybe not that quiet...