I used "Be Quiet".  Specs indicate it's equal to Dyno Max but is considerably less $$$.  Made in Canukastan.  Seems to work pretty well.

https://www.b-quiet.com/?www.b-quiet.com&gclid=Cj0KCQjwm9D0BRCMARIsAIfvfIZQi2TiusM0VMZ7lQzNpZn_3_MNHP-B3tZ9p-HEPU6R80qX1c6BPJEaAvsaEALw_wcB

BB

Yep, me too. I put it everywhere, some places two layers.

I used NVX sound deadener from SonicElectonix. They're out of Knoxville KY. You can get it in black or silver and I bought a package that covers 40 as ft on sale for $99 with a free roller. It's advertised as 91 mil thick. Went in nicely, really sticks well, no oder. Google NVX sound deadening. They may also have free shipping.

Sound deadening , just lowers panel vibration,, 20% coverage only needed



sound blocking requires Mass loaded vinyl (blocks low freq)

 

High Density foam is glued to under side of vinyl  

I have parts list for the do it yourself,, save 75%  

referance  https://www.sounddeadenershowdown.com/


and then topped off with ACC Mass loaded carpet 

https://www.accmats.com/articles/everything-about-mass-backing/

and  if you have a bit of engineer in ya    this is great info for a basic understanding of sound waves 

https://onlinelibrary.wiley.com/doi/full/10.1002/mawe.201700131

I have a lot of time so I decided to do this research  

Last edited by Don (4/14/2020 7:57 AM)

I sprayed in Lizard skin for sound and heat. Not to easy to do on a car with any type of interior. I also bought all the jute cuts offered by Johns Mustang for the floors then bought extra from the upholstery shop that did my seats and headliner to make sure all surfaces were covered with at least one layer. some area have 2.  

I was on a budget and wantted to cool the car down from the heat on the floor, so I went to Amazon. I used KilMat 80 from Amazon throughout my coupe for sound and the went over the top with Car insulation sound deadener and heat mat from Amazon. I am very pleased at how quite the car is and the floors dont get hot in the summer anymore. Here is a couple pics of the install. i also added a wood panel between the rear seat and the trunck and covered as well. cv

Last edited by Cab4word67 (4/13/2020 11:23 PM)

I used to find the drone and drumminess inside the cabin annoying. Having a conversation was difficult driving down the freeway too.
I put in some dynamat along the floors (after really coating the floors with decent rust proofing paint) and under the rear seat I put in that high density/heavy foam-vinyl, as well as the dynamat.
I stuffed some of that foam vinyl inside the rear seat.
One of the absolute best things I did was install mdf paneling behind the seat and on the parcel tray. Huge difference...
I am of the opinion that in these old cars, a significant amount of noise comes through the trunk. I've managed to dramatically reduce that noise.