Sound Deadening Success...

[OCD90]

I did a quick job of putting in some sound deadening last night, and it was a great improvement.

In about 30-minutes I did the underhood (Dynamat Underhood product), and I did the driver and passerger side floor, then on up behind the AC on the passenger side, and to the cardboard on the drivers (Dynamat Xtreme).

I haven't even done the doors, beneath the seats, the back or anywhere else, and I have already noticed a solid difference. It's still not quiet by any means, but it was worth the $100 or so in product I've used so far.

I think the doors and both seat boxes will yield the best results, but I had an hour, and it looked (and was) easy.

The only thing I didn't like? The Dynamat has a shiny aluminum finish, so the parts that weren't covered by the OEM floormats are sort of flashy. I prefer the white of my car's color...or I may yet color them black to minimize that.

FYI.

[Tawayama]

Torrence,

That's pretty good news. I have wondered about the Dynamat, and your report is heartening.

Did you find a place to give you a 'deal' on the stuff? I know it can be expensive, and the CB in me is keeping me from buying some.

[TwisteD90]

That stuff works very well. I had some installed in my D90 (Doors, front foot panels, and rear tub) and noticed a big difference. $100 well spent. I might buy some more to do the fire wall.

[Rick Carlisle]

This is good to hear as it is one of my next steps.
Torrence, keep us updated if you do anymore and what your experiences are.
Thanks!

[Davis]

I would get it from large "wholesale" automotive paint suppliers. There is one in Colorado off Sante Fe called Painter's Supply.

[dave_lucas]

Yousef,

I still have some of the stuff you gave me so send me an email if you need some.

[Mike Hippert]

If Dave M is around I think he did his 90 with Dynamat, I think he found e-bay to be very cheap.

[dmarchand]

As some who now visit this board from places like Pirate say....

SEARCH. :finger

http://www.d-90.com/discus/messages/16/2551.html

http://www.d-90.com/discus/messages/46/1012.html

http://www.d-90.com/discus/messages/46/1561.html

http://www.d-90.com/discus/messages/16/2374.html

[Tawayama]

Sweet. Nice posts. Thanks for doing the dirty work for us David. :)

I was also glad to see that you had positive results when using the Dynamat over the Herculiner. I erroneously thought that Rhinolining would be an effective sound deadening material, so I had damn near ever panel in the CC done. Didn't work for nothing, although it does make a nice textured surface that's easy to clean.

I will start surfing Ebay for some Dynamat or BrownBread. I kind of like the BrownBread stuff because it looks like I won't have their logo everywhere. :)

Nice.

[OCD90]

Yes, I bought mine on Ebay. It was a LOT less than going to a stereo store. The hood was pricey $50. I got the big pack of extreme for about $100. It looks to be enough to do the doors, firewall/front floor and a bit more. I did the rear door first, and it made no difference.

The thing is still loud, but noticeably less loud (especially the highs)...and that from just the hood and front floors.

[Tawayama]

Here's 70 sq. ft. of Brown Bread for $139 bucks.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3077382320&category=1498

[dmarchand]

Just a quick follow up to all of this. Your going to find the best results for sound deadening by applying two layers of material in most places. I've tried to do two layers of the dynamat extreme stuff everywhere. Even under the hood.

However, while this assists in softening road noises, your going to find a whole new set of noises appear to replace them. My cabin is definitely quiter, but it's only relative. Remember, your still driving something equivalent to a toaster, so wind noise will remain. As will more squeaks and other odd noises you've never heard in the cabin before, which were canceled by that road noise. I actually attribute these noises to the effectiveness of the sound deadening as it reflects the interior noises quite a bit better. But at least I can now hear the stereo or the person next to me talk.

Slade, I haven't looked into what the brown bread is made of. The main reason I went with the dynamat was the adhesive and aluminum, that would not soak up water or anything else I spilled/swamped in. So you may want to consider that. Make sure the stuff isn't a sponge.

Good luck and let us know how it comes together.

[mikeslandrover]

Sound deadening under the seats is very effective and cuts down on the heat transfer too.:grin

[Tawayama]

Yeah, the bummer part is I was doing all this sound deadening with some CRAP I got at the local hot-rod store. It was cheaper (a LOT cheaper) than the Dynamat or Brown Bread, and it was a total waste of time and $$$.

I recently saw it at Home Depot advertised to wrap hot water heaters in. That really added insult to injury.

The part that makes me the maddest is I really spent a LOT of time and the install is super clean and tidy. Too bad the stuff I used is trash.

The Brown Bread is similar to the Dynamat, adhesive and foil covered asphaltum based material.

I'll report back. It's gonna kill me to rip out all that pretty stuff I already put in.

I was thinking 2 layers for sure in several areas. I'm also glad to hear it worked on the doors, because that was also in my plan.

[Buckon37s]

Have you guys ever thought to try Body Schutz from 3M? I painted my body underneith and the whole interior including the roof. No headliner. It is a rubberlike compound used by car manufacturers. Cost all said about $200 with the special spray nosle. It really cut down on noise, but it is kinda hard to tell because I also put down padding and water proof carpet, so that probably made a big difference too.

[Tawayama]

I think the padding and the waterproof carpet did more than the spray on stuff.

I've also done a 1/4 inch neoprene pad on the entire floorboards of the CC, and also plan to have carpets made to fit the tunnel and the floorboards. I'll put the Brown Bread under all of that.

Maybe that'll help.

[Buckon37s]

Hey Mike, is that avatar you, your better looking than I expected :grin

[Tawayama]

;)

You'd change your mind if you could see under my fingernails.

Bleeeaacch!

:grin

PS...I'll never tell! :tounge

[kellymoe]

I recently put in Wilsonart flooring in my dining room. The insulation that goes under the flooring seems to have very good sound absorbing properties. Unfortunetly I threw all the scraps out after the job. I am going to go to the shop I used and ask for any scraps they have. I will let you know how it works out. Obviously you would not want to use it in areas of extreme heat but this could be a cheap alternitive.

Kevin

[Campbell]

I was wondering how the dynamat and other products are attaches. Are they self stick and are they water/mold proof?
Thanks
Rich

[dmarchand]

I was wondering how the dynamat and other products are attaches. Are they self stick and are they water/mold proof?

Rich, most of the products have their own self adhesive already applied. But the stuff is usually sticky as hell and can be a one shot deal.

As far as mold, well I would be more concerned about water getting between the dynamat and the metal it's applied to rather than mold. If you choose the right product, they are not made from materials that will retain water. However, this isn't to say water can't get trapped between the product and your truck. For that, I herculined everything on the floor pan and tub before I applied the dynamat. Then at least I have a layer of something else for any moisture to sit on.

You can learn more about the various products and materials on the dynomat website.

[kellymoe]

I drilled a few small holes in the floor pan and then I am going to use a hurculiner type product. At least when water gets in ther it has a way out.

[WCURoverD90]

Dynamat works wonders on rattles and sound proofing....

[mhansen]

Dynamat is butyl rubber with foil on the side that you don't want to stick The only way that water will get under Dynamat is if it was there before you stick it. We use butyl rubber pads in the Construction world to stick the pavement markers on the highway for traffic control. It sticks like crazy. It would be very hard to remove it from your truck.

[rover4x4]

Does the Dynamat absorb mositure? I think for a true cheap fuck you could get the sound deadening material from a Range Rover Classic.

[usadventureracing]

What about grace water shield? I have heard a lot of guys are adding it to hot rods. Home depot sells 225 square feet for around 150.

[rijosho]

Does the Dynamat absorb mositure? I think for a true cheap fuck you could get the sound deadening material from a Range Rover Classic.

Not really sure. The Dynamat is like a tar substance, which I do not believe absorbs it, but it does break down over time.

[Spook]

I have some stuff from home depot i plan on using found some you tube videos and some folks doing tests with it. I was thinking of lining the doors and seats with this and then spraying the entire tub with lizard skin. I found this site helpful www.sounddeadenershowdown.com
I do agree that our trucks are echo chambers. I just want to take the edge off so I don't feel liking I am yelling.

[winn442]

Lowe's and home Depot sell a product in the roofing and flashing section, same exact stuff as Dynamat, only it comes in 14" wide rolls. maybe a mill or so thinner, but it's about 75% cheaper, so you can double up on it and still come out way cheaper....I did my whole interior, including the roof, I can actually carry on a conversation at highway speeds now.

[CDNRover]

Here's a trick I did with my 110; I bought from a local outdoor shop camping foam mattress. I then use contact glue to stick it to my van roof. Cheap effective and the foam are closed cell so no water problem. I tested it before and after with a dB meter (Iphone application) and at the same speed, on the same road, I cut down about 10-12 dB. I also did the doors and now I'm up for the bulkhead. I might put some of these mattress on the top of the bulkhead and Dynamat the floors. Heating the cab is easier now and as the mattress has a foil final coat, it reflects the heat and keeps it inside. I might have pop 200$ including mattress and glue.. But how different it feels now! Hope this help!

[imola]

Does the Dynamat absorb mositure? I think for a true cheap fuck you could get the sound deadening material from a Range Rover Classic.

The stuff they used on the Range Rover Classic for sound deadening absorb water like a sponge.

[o2batsea]

The stuff they used on the Range Rover Classic for sound deadening absorb water like a sponge.
Cuz that's what it is, a sponge!