Dynamat (Damplifier actually) is excellent.

[alkemyst]

I know Lexus uses this in some of their cars and a few other automakers.

I own a 98 240SX SE...a pretty quiet car from the start, but I have added coilovers, spherical ends, bracing, lower profile tires, etc and some rattles crept in. I bought this car because I just love the shape and feel of it.

Now some of them were just the typical 6 years of loosening, go in and re-tighen or replace a few clips....however their was still more noise than I liked...the doors are frameless so that wasn't a plus either in quieting the door closes.

Anyway, ordered up 100 sq ft of Second Skin Audio's Damplifier and did my trunk floor, rear quarter panels/wheel wells, the inner and outer doors, and will do the plastic panels.

I also picked up about 125 sq ft of foambymail.com 's ensolite (volara) closed cell 1/8" foam. Haven't used it yet, except for the Craftsman triple decker tool chest I bought my dad for Father's day...the closed cell foam I put between each of the three drawer units and it provided a non-scratch surface for the exposed work area on the lower unit.

The car is still without it's interior, but the noise level is actually less than it was when the rear seat, door/side panels and trunk mat was in.

It's a PITA to do esp in 100 degree weather, you have to bleed to do this job (or suffer gloves snagging on everything), there is no way to get your hands everywhere they need to be and roll the stuff down without that. My hands are usually cut up so it's was just another day except for the heat.

I took out my spare and jack for a 45lb savings of weight and put it back in in the form of a much better weight use.

I am not going crazy with the stereo, I am looking more to work the powertrain more (suspension is pretty much done...coilovers, bracing, subframe bushings, adj tie rods, etc) after I finish upgrading the brakes to 300ZXTT on all four corners.

I am all for the guys gutting everything for a tenth or two, but I'd rather move around more quietly.

 

[MikeMike]

friggin expensive. though.

try peel n seel at Home Depot/Lowes

 

[BrokenVisage]

RaamMat is better, cheaper, thicker, more sticky and easier to install and take a roller/heatgun too. Dynamat is the Kleenex of car audio sound deadening though, just too expensive for the good stuff.

 

[alkemyst]

Originally posted by: BrokenVisage
RaamMat is better, cheaper, thicker, more sticky and easier to install and take a roller/heatgun too. Dynamat is the Kleenex of car audio sound deadening though, just too expensive for the good stuff.

not getting into a dampening debate...most have gone to butyl rubber now...no heat (even on RAAMAT and I talked to him a lot about it...it came down to he is using a slightly asphalt base, even original Dynamat failed in the beginning), no asphalt smell.

Second skin's base is equal to dynamat extreme....I put 2 layers on my inner doors, 3 on my quarters (in quarter panel sub install), each of those have an extra layer in the key areas. Looking back overkill...I am not going to have 1000 watts into a 15" block beater.

Peel and seal does work, but not in florida, it's too hot for it to work on vertical surfaces.

I paid $200 shipped (45lbs) from the west coast.

I studied this stuff quite a while though...you stick stuff to anything there is a mess to remove it...sticking something to the WHOLE inside of your car is on a whole other level.

I am happy...it's hot as hell out and the stuff is solid.

I will be much happier once my interior is back in.

 

[Thegonagle]

The jack and spare tire is severely overrated...

Until you actually need to use them.

Best of luck! 😉

As for sound dampening, well, I wanted to try something when I installed the door speakers in my work car, a '91 Accord, so I bought a can of undercoating spray and sprayed it inside the doors. Next time, I might actually try some Dynamat (or generic equivilant).

 

[HeroOfPellinor]

I used it on my computer case.

 

[jerryjg]

I damp all of my speakers.I damped my computer speakers (altec lansing multimedia) and they sound great. You can use modeling clay too.