sound deadening material

[dunl]

I'm looking for some sound deadening material for the bed of my 3500 Dodge.  We travel with our dogs in the back, so I'd like to make it a little quieter for them.  I heard there was some peel and stick type of stuff at Home Depot or Rona that can be used....does anyone know what it is actually called?

[FiEND]

is there a topper on it or are they just in crates?

back in the day we used to ride in the back of trucks, heck i slept in the back of my cousins most of the way from medicine hat and the noise wasn't much issue.

[dunl]

In a topper, sliding windows, with wired in fans plus temp gauge.

[ornamental]

I'm looking for some sound deadening material for the bed of my 3500 Dodge.  We travel with our dogs in the back, so I'd like to make it a little quieter for them.  I heard there was some peel and stick type of stuff at Home Depot or Rona that can be used....does anyone know what it is actually called?

sounds like your after roll roofing or building membrane. i have some membrane i'll apply to my xj, but thats under carpet.  the butyl is what you want.   the covering may not be strong enough for the back of a truck....
another name  is  SBS roofing with a base sheet and a cap sheet.  the cap sheet has granuals in the surface like a shingle.
dynamat types for car audio would be very pricey for the much area. 
how about applying thick amount of rust proofing to the underside to deaden to meal sound.
 

[4PLAYZJ]

try a wood box liner that would kill alot of the sound and still stand up to some use.  Check out Raven.  You could even put some sound insulating material like dynatmat under the box liner.  There is a company in Lethbridge that manufactures this stuff in commercial rolls and is less than 1/4 the cost of dynamat.  They will even ship to your home.  I cant remember the name but I will ask at work tomorrow and post the name.