RA100923

I've searched, and read just about every thread about it, but the vast majority of threads about Dynamat are from 2010 and way prior. In fact, there's only 1 thread with "Dynamat" in the title in 2012. So let this [hopefully] be the go-to and up-to-date thread about Dynamat.

With that said, I want to know what everyone's experience with Dynamat is now; now that some of you who mentioned it in past threads have had it for a few years and have legit experience to speak of.

I just ordered a pack of Dynamat Extreme (see the pic below), and my goal is to really silence the cabin of my car. It's my daily driver, and in my pursuit of making it more and more comfortable, I figured some Dynamat would be the next logical step. I'm going to lay it on the floor, doors, roof, and rear deck. I plan on installing it in the next couple weeks.

So what do you guys say? What kind of advice do you guys have? How many layers? Which areas of the car yield more results with Dynamat vs. other areas? Is the pack I ordered going to be enough? Any install tips?

Thanks in advance...

Aau

if u plan on doing ur whole ur gonna need a whole lot more than one pack, depending on the size of ur car i believe one pack is barely enough to maybe cover the floor in the trunk but it all depends on what u plan on doing with it, i don't know what u mean by making it more comfortable and how it is gonna make ur car more comfortable for driving...

RA100923

More comfortable in the sense that road noise will be reduced

mechanix619

Dynamat will reduce rattles but it is not a noise suppression material. You will need to use special soundproofing materials like CCF to reduce noise. Dynamat makes additional layers.

Check out DIYMobileAudio.com There is a lot of information on sound deadening.

RA100923

Alright, we'll see. In the next week I'll be throwing a layer of dynmat on the floor of my 96 civic sedan. Later I'll do the doors and trunk. Hopefully I get the results I'm shooting for - the package of Dynamat I bought cost $150

mechanix619

If you are looking for actual sound deadening the Dynamat alone will not do the trick.

mikekh10a

iTrader: (2)

i think dynamat works good, but you're paying soo much money, just for the name brand

full Circling

dynamat stops vibration, not noise. mechanix knows whats up

this is more of the type of materials you're looking for:
http://www.sounddeadenershowdown.com/cgi-bin/index.cgi

mechanix619

Nice! I was looking for that link but couldn't find it.

OP, the trick is to apply the CLD tiles to 25% of the desired surface; that'll stop the vibrations and save on the expense.

Largemember69

dynamatted my entire civic, had a pretty nice system. I was attempting to create a quieter cabin, and improve audio quality.

I spent 2 whole days taking my entire interior apart and carefully applying it everywhere.

Put the whole thing back together and I couldn't tell a difference at all. So I basically just wasted 2 days, $125, and made my car slower.

Never again.

mechanix619

The first time I "sound proofed" a vehicle I spent a lot of money on Dynamat hoping to get BWM quality interior sound out of my Civic. The rattles were better but the road noise was still very much present; knowing what I know today that's exactly what that install should've yielded.

I only installed the base layer Dynamat; the stuff with the shiny side that's available at any car audio shop. The trick to achieving actual sound deadening is installing the other two layers of Dynamat products, Dynaliner and Dynapad.

Dynamat isn't the end-all-be-all product, it's just the mainstay brand name. There are several other products that produce the same results. The trick to achieving true sound deadening is the closed cell foam and vinyl layers; the butyl rubber layer is strictly for rattles.

joeshmo

Mass loaded vinyl.

I added "dynamat" (audio-technix b-stock 60mil butyl). Definite improvement in sound quality and a small improvement in road noise, but mass loaded vinyl takes the cake for sound deadening. It also unfortunately weighs a ton, so be ready for that.

RA100923

Damn...hearing everyone's experience with Dynamat is making me start to regret my purchase. When I ordered it on Amazon.com, there was 150+ reviews, majority of the 150+ reviews being 4-5 stars, and everyone swearing that it made a "big" or "huge" difference in the car being quieter.

I guess I'll have to wait and see after I do my install

mechanix619

It's not a waste, it's just step one in a possible three step process. Apply the Dynamat to 25% of the surface area; the goal with Dynamat is to reduce the rattles. After that's done then move on to the other layers. You're on the correct path.

RA100923

I was at a fabric store today buying fabric to wrap my door inserts (black pleather to match my leather GSR seats) and I saw that they sell foam by the yard.

Then it dawned on me that the high-density foam they sell would be pretty effective if I bought enough of it to stuff into my doors. I've read in a few places that foam is more effective than dynamat, and when paired with dynamat the two work really well together.

Anyone had any experience with foam inside their door panels?

mechanix619

Door treatment:

http://sounddeadenershowdown.com/wp/...e-areas/doors/

RA100923

Nice, thanks!

Hey check out my build thread -- let me know what you think of my latest DIY

mechanix619

I browsed your link a few weeks ago; that's how I first noticed your HID project. I dig the Integra leather seats. I've been debating for years if I want to drop the money on Recaro seats.

I wrapped my doors in the red tweed like the CTR but the leather goes very well with the seats. I need to redo my tweed, after four years its starting to look crappy.

But back to sound deadening. If possible mount the speaker to the door and not the door panel. If you follow the door sound deadening link step by step you'll actually create a closed enclosure with your door, which will help with midbass.

I've been in contact with the Retro Fit Source, I might be ditching my FX-R projectors for the Morimotos. I don't know why my cutoff is a rainbow but it's driving me nuts.

fcm

As has been mentioned, Dynamat is not for sound "deadening", it is for vibration dampening.

If you want a quieter pass. compartment, you will need to do the Dynamat like you have then install a carpet underlay, covering the complete floor and up the inside of the rocker panels and over the wheel wells.

Pick up a few cans of rubberized under coat, and spray 2-3 coats on ther outside of rear wheel wells, remove the inner fenders and spray, [2-3 coats] on the cabin portion of the front wheel wells.

The carpet underlay needs to go as high up the fire wall as you can get it, for best results, pull the dash.

Find an Auto Upholstery supply store and get enough JUTE underlay to do the car. 94

RA100923

I noticed they out some 3M "Thinsulate" on the inner side of the door trim panel. I'm considering doing something similar - I bought some high-density foam that I've heard is pretty effective at reducing noise and heat (and less expensive).

At first I was considering putting it inside the door- between the inner skin and outer skin. But after seeing the link you posted it looks like I should glue/tack it to the door trim panel.

What do you think?

mechanix619

The door panel is the way to go. The inner door skin still sees a little water, that foam would just get crappy.

RA100923

Word. I was thinking the same thing. That if I placed it in the inner skin, on the outside of where the glass rolls down, the foam would get moldy after a while.

Then I considered still installing it in the inner skin, but on the inner side of the glass. But when I saw the link you posted, I figured the door panel is where it's at.

So I'm going to apply the dynamat based on the "important" areas shown in the link you posted, along with 1" of high-density foam on the inside of the door panels. Hopefully I'll experience a noticeable difference.

I'll keep you posted on my results...

RA100923

This is a test run. I'm not going to glue the foam to the panel yet, until I determine that everything fits properly and the foam + Dynamat is effective. I'm going to apply the Dynamat to the doors according to the link you posted - in the most effective areas of the door

Here's some pics...

mechanix619

Very cool!

RA100923

Word! I just hope it does what I'm hoping it does