sound proffing

What other than dynamat works good at sound proffing my tahoe. Is there any spray type stuff like a undercoating that I can spray to the underside of the body. Or is there any other susgestions. I have a lot of road noise and exhaust sound. I have already layed down a layer of dynamat in the back cargo area and it cost me a fortune and I refuse to pay that much again and it didnt seem to do that much to help the noise. Any other ideas?

I used second skin in my ride and it worked really well. They make a liquid that you can spray on and I herd it works really well. They have really good prices and the quality is great. Sign up for the forum to get a discount code that saves you like 15%.

http://www.secondskinaudio.com/

dude, I have 8 12's in my extended cab GMC and there is no noise or rattles at all. I used FAT MAT. It is 1/2 price of Dynamat and it worked great for me. they didnt have a spray in or liquid, but the rolls worked really good.

Cascade Audio, stuff is badass