Ultimate Sound Deadening Project

I finally wrapped up this big project and wanted to document it. The whole thing took over 100 hours of labor and around $1,400 in material. The goal was 90%-95% coverage on all panels using Dynamat Xtreme & Dynaliner as the sound deadening materials.

I decided to start on the back cab wall because it was the easiest to get to as far as disassembly goes, but it was actually a hard panel to do properly due to the stamped ridges in the panel. In hindsight, the easiest panel to apply the dynamat was the roof.






https://youtu.be/dgKWQ4VPTiE?si=Wdg7K-5aTVx4h3Hb

Now that I got my process figured out on how to apply this stuff, it was time to tackle the roof & floor.

 

I dropped the headliner and started laying out the material. It was very easy since the panel is large and has minimal ridges stamped in it. Then I treated the B & C pillars before moving onto the floor.












https://youtu.be/gLdUmhdRMwg?si=wHILn4Bz7J8LG6kC

 

The last bits of the project were the doors and they turned out to be the hardest part! The inner door skin is very thin and slices you up when you’re applying the material on the outer door skin. I also applied some butyl rope between the reinforcement bars and outer door skin to further dampen any sound.








https://youtu.be/5WYGaCSIPII?si=zD2WeSmMr_BRgSiz

 

One dynamat extreme mega pack covered the cab and one bulk back covered the doors. Multiple sizes of dynaliner were used depending on the location. In the end I used four 1/8”, four 1/4” & one 1/2” rolls of Dynaliner. One roll of butyl rope was enough for all the doors.

 

Great videos and pictures! Seems like its gonna make one hell of a difference. I got some questions. How are you feeling about the results? And why choose dynamat & liner? Ive been deciding what material/brand to use myself.
I've been wanting to do a smaller scale project like this by starting with the doors and probably doing the back wall.

 

Very thorough ! Do you have a decibel reading before and after your project?

 

Thanks! I ended up going with dynamat because of the quality and longevity of the brand in the market. The material weighs less and dampens better than competitors which offer cheaper alternatives.

 

Wow, nice work! I only did my back cab wall and rear floor following my rear seat delete and it was very tedious. I used the Siless brand for mat and deadener and am happy with it. The noise coming from the back following the rear seat delete was terrible pre-deadening.

 

Thank you! I did a before and after sound deadening with just the cab completed (no doors). There was about a 3db reduction in noise, which is a great result.

I just finished the doors and still need to do one last sound test. I will post the results here when I do

 

I hear good stuff about siless and noico. The back wall is crazy loud with a full interior. Couldn’t imagine how bad it was with the seat delete

 

Side note: Aside from dampening sound, these materials also act as a thermal insulation barrier. So the cab will be cooler in the summer and retain heat better in the winter.

 

Nice write-up, photos, & video.

Looks like your measured noise reduction was closer to 3 dB rather than 2 dB.

 

Damn. Man made it a Lexus. Hopefully I can do this cheaper with Raamat.

I ran into an unexpected issue that so far has put my attempt on pause.

Inner doors, I was trying to stick on Raamat. They were dirty preventing adhesion.

if anyone knows what to do please post.

it seemed no matter how many baby wipes I tried using, the dirt remained.

co worker who used to work at a body shop told me I should just wash it out. Scrub with soap and rinse with water or pressure washer. Let it drain out the drain holes. Let dry.

maybe adhesion promoter. THEN try sticking on the Raamat.

 

Rubbing alcohol, meh. OK for light duty.

For heavy-duty, GooGone -- or acetone, applied carefully & not to excess.

 

As stated above.

Acetone or acrysol and a ton of clean rags/towels/wipes. It's the inner door skin... I wouldn't be afraid to go to town on it.


Awesome work as always Gio!

 

Oh yea I fixed that

The first snippet about the 2db was a screenshot from another forum, just to put things into perspective

 

There was a ton of dust/dirt in the doors. I sprayed everything with water and wiped it with a microfiber. Then I wiped it all down again with 99% isopropyl alcohol before applying the dynamat.

 

Thanks!

 

chemical sure no problem. The sheer volume of stubborn stuck dirt just wouldn’t go away. Probably gonna try washing. Metal door shell should have rain drainage tiny holes at the bottom that could be used for this.

maybe inspect and check speaker connections while in there since music recently started to snap crackle pop intermittently which is supposedly caused by that.

 

I did the same about 1.5yrs go. IMHO it made a decent difference. The roof was a huge difference.