Take a look at Cascades products, they have a liquid sound deadner that can be sprayed on, and it doesn't reek of MEK fumes either, its water based. They also have a thermal ceramic barrier compound that has impressive R qualities even in thin layers.

http://www.cascadeaudio.com/prod/tc1.html

http://www.cascadeaudio.com/prod/vb1x.html

John C.