I have a hollow core bedroom door.
Dynamat door inside or outside.
Both dynamat and kilmat are relatively easy to install.
2 boxes will do a car unless you go crazy then its about 3 1 2.
Make a piece to fill any large holes best you can yes msg fiberglass aluminum flashing anything you can mount to the door really then cover with more closed cell foam or peel n ply.
On the doors we install extreme on the outer skin then use dynaliner 1 4 on the door structure to keep any.
Dynamat can be used in any vehicle to create a cool and quiet ride.
The people in my house are loud af.
I used about 2 3 square feet there.
Dynamat extreme is about 1 8 thick rubber based just like strip caulk that you would use under the roof rail strips.
Another great cheap mod is adding foam baffles to the back of any door deck speakers.
They like hearing the sound of their own voices and my two nieces are always yelling at each other.
The most difficult part of the project is removing and refitting the interior of your vehicle as you ll have to remove the door panels carpet paneling and headliner before installing the product.
Dynamat xtreme custom cut kit to cover the inside and outside of both doors of a 1968 1969 chevrolet camaro pontiac firebird.
The outside of the door frame which is the part your speaker go on and the door panel clips to yes.
The inside of the the door skin yes.
How to install dynamat and kilmat 1.
Dynamat products damp vibrations stop noise and block heat.
Alan slapping dynamat etc on to the inside of the outer panel is a very good idea if you re trying to kill noise from the outside.
Dynamat is a like a think sheet of tar sandwiched between two foil sheets.