Hey, Brandon! How are you?
How has your peel and seal held up to summer heat? Have you been through a Carolina summer with it?
Take a look at
Sound Deadener Showdown
This is an impressive testing of sound deadening mats and how they hold up to heat. After the reading I've done on mats, I wouldn't use an asphalt-type product like Peel n' Seal or Dynamat Original.
I'll probably use some mat on metal panels--but not slathering it on the whole surface--and I'll be using Second Skin's Damplifier or Raammat. With all the labor involved, it just doesn't strike me as that much more money to get the good stuff.
But, that said, if you've had a great experience with the cheap stuff...maybe I could be persuaded!