Sound Deadening

I want to sotp all the rattles in ym trunk and was wondering what to use. And i decided that either wanna use brown bread or b-quiet extreme but wasnt sure which one to use. Wanna know if the brown bread is worth the extra money over the b-quiet extreme. Also wanted to know about the spray sound deadener and if it works good or not. And another thing i know that the rubberized undercoating isnt good for in car use but was wondering if i used it for the under of my car would it kill some road noise from in the car or if there is an alternative to do that. Any help is appreciated!1998 Volvo S70 T5 - It's Swedish isn't that weird?

That spray on undercoating works great under a car and works awesome inside a sub box - definitely recommend it there - seals that box real good. Have used the Lightning Audio spray on crap and did not like it at all, was messy, took hella long to dry, lots of prep to clean the metal before application, moderate results at best. Same car done in Brown Bread yeilded way better results, My opinion, Brown bread is worth the xtra bread.Top Secret, I can tell you but then my wife will kill me.

So the spray on undercoating does a good job at stopping road noise and makes the inside of the car quieter when driving, nice! And the brown bread is the stuff to use. Thanks for the help forbidden!1998 Volvo S70 T5 - It's Swedish isn't that weird?