Anybody heard of........

[WRMZ71]

Has anybody ever heard of VBlock before? I redid the floor in my truck and the old material underneath the rubber floormat was crusty so I through it away. I'd like to get a nice sound deadener, heat shield but not pay an arm and a leg for it like dynomat will cost you. I was at an audio shop and they had this stuff and he said it would work great. The stuff I was looking at is called VB3. Has anybody ever heard of this stuff before and whats your opinion?