sound damping at partsxpress? Any good?

asphalt based is lower grade stuff, doesnt hold up to heat as well as butyl based deadeners.  There fore it will be more likely to fall off.  i believe the regular dynamat is asphalt based, the extreme is butyl based.  Second skin makes a good product that is butyl based.  I am still looking for a deadener that is cheap, but after reading i like to get a butyl based product, but they tend to run more in cash.  i think the cheapest i have seen is RAAMmat.   they have a product that is butyl based.would u like your chicken original or extra crispy?