Joined: Nov 2016
The asphalt stuff you bought is a very poor imitation of the sound deadener found in Cougars. Even if used 'properly' it would have very little benefit. Your lizardskin should do a better job. Its purpose (and that of the asphalt stuff) is to damp panel vibration, turning vibratory energy into heat. Instead of being able to resonate like a gong, the panels will make a dull 'thud' and act as a sound barrier to lots of noise.
Your carpet's mass backing is another form of sound deadening, as well as heat insulation. It isn't super at preventing resonance, but it is a very effective barrier to most sound. Between your carpet, and the lizardskin, you should be pretty good. Hopefully, the mass backing of your carpet protects your lizardskin enough to prevent it from flaking off!
I smile a lot. It makes people wonder what I'm up to...