Nissan 370Z Forum

Nissan 370Z Forum (http://www.the370z.com/)
-   Exterior & Interior (http://www.the370z.com/exterior-interior/)
-   -   FREE! GTMat Automotive Sound Deadener (http://www.the370z.com/exterior-interior/58850-free-gtmat-automotive-sound-deadener.html)

Cmike2780 08-15-2012 04:09 PM

Quote:

Originally Posted by GTMat (Post 1868166)
I know a few of you have received your samples this week. Any reviews or installation pics out there? :(

Real busy at work and I won't get a chance to install until the weekend. First impression is that it looks like quality stuff for the price you guys are setting.

...and it even came with a roller, lol.

GTMat 08-15-2012 04:19 PM

Quote:

Originally Posted by Cmike2780 (Post 1870598)
Real busy at work and I won't get a chance to install until the weekend. First impression is that it looks like quality stuff for the price you guys are setting.

...and it even came with a roller, lol.

No worries, we are just really anxious to know what people think and to hopefully see this on some cool cars! :tup:




We are still giving away the sample pack if people are still interested.

jpritche 08-15-2012 06:10 PM

Quote:

Originally Posted by GTMat (Post 1870611)
No worries, we are just really anxious to know what people think and to hopefully see this on some cool cars! :tup:




We are still giving away the sample pack if people are still interested.

I do not have work Friday, so if there is no rain I will have it installed then. I took before videos, with decibel readings. I will also take after videos as well as install pics.

Huckleberry 08-15-2012 11:53 PM

Better pics and review after a few days!

First impressions: This was definitely my first time at the rodeo! The GTMat was incredibly easy to handle and adhered flawlessly.

http://farm9.staticflickr.com/8281/7...da76609b_z.jpg

http://farm9.staticflickr.com/8427/7...54450d3a_z.jpg

http://farm9.staticflickr.com/8281/7...a454b169_z.jpg

http://farm9.staticflickr.com/8433/7...97d4f988_z.jpg

http://farm8.staticflickr.com/7111/7...5cd811bb_z.jpg

http://farm9.staticflickr.com/8438/7...90b82db6_z.jpg

http://farm9.staticflickr.com/8286/7...e68f69ca_z.jpg

http://farm9.staticflickr.com/8282/7...bd9e18c6_z.jpg

http://farm9.staticflickr.com/8307/7...3b9c6bee_z.jpg

http://farm9.staticflickr.com/8302/7...770cdda3_z.jpg

MyKindaGuise 08-16-2012 08:21 AM

Any audible difference? Im excited to hear if this stuff works.

GTMat 08-16-2012 09:44 AM

Quote:

Originally Posted by jpritche (Post 1870771)
I do not have work Friday, so if there is no rain I will have it installed then. I took before videos, with decibel readings. I will also take after videos as well as install pics.

Thanks for dedication jpritche! Keep us posted sir. :tiphat:

Quote:

Originally Posted by Huckleberry (Post 1871282)
Better pics and review after a few days!

First impressions: This was definitely my first time at the rodeo! The GTMat was incredibly easy to handle and adhered flawlessly.

Awesome to see GTMat on a Z! :drool: Looking forward to your results Huckleberry. :tup:

Quote:

Originally Posted by MyKindaGuise (Post 1871528)
Any audible difference? Im excited to hear if this stuff works.

MyKindaGuise, feel free to call us for a sample and test drive it yourself. ;)

GTMat 08-16-2012 04:22 PM

Would anyone be interested in having their car featured on our promotional flyer? Preferably a full shot showing an install if possible?

JARblue 08-17-2012 10:34 AM

Quote:

Originally Posted by GTMat (Post 1872483)
Would anyone be interested in having their car featured on our promotional flyer? Preferably a full shot showing an install if possible?

I wouldn't have a problem with that, except that I haven't done the install yet. If all you need is a photo of a hatch install, I guess you don't need local. I'm sure there's someone out there willing. :tup:

edub370 08-17-2012 11:33 AM

is anyone doing this to try and get rid of the crappy sound we get when rocks hit the rear fenderwell? thats what im hoping for

Cmike2780 08-17-2012 11:37 AM

Quote:

Originally Posted by edub370 (Post 1873924)
is anyone doing this to try and get rid of the crappy sound we get when rocks hit the rear fenderwell? thats what im hoping for

That's what I'm hoping for. I wish I had some way of measuring the sound levels. Anyone know of an iPhone App that works?

GTMat 08-17-2012 01:18 PM

Quote:

Originally Posted by JARblue (Post 1873759)
I wouldn't have a problem with that, except that I haven't done the install yet. If all you need is a photo of a hatch install, I guess you don't need local. I'm sure there's someone out there willing. :tup:

We'd like a photo showing most of the car with some install showing, but knowing the Z, that is a hard shot to even get. Any creative shots would be appreciated. :)

Quote:

Originally Posted by edub370 (Post 1873924)
is anyone doing this to try and get rid of the crappy sound we get when rocks hit the rear fenderwell? thats what im hoping for

Quote:

Originally Posted by Cmike2780 (Post 1873930)
That's what I'm hoping for. I wish I had some way of measuring the sound levels. Anyone know of an iPhone App that works?

Sorry, can't help you with this guys. Maybe someone else can chime in?

DCNISMO 08-17-2012 01:37 PM

Quote:

is anyone doing this to try and get rid of the crappy sound we get when rocks hit the rear fenderwell? thats what im hoping for
To get to the rear fenderwell, you need to take all the panels out of the trunk and then take off the panels behind the seats too....then you can add the sound deading material to the rear fenderwell on both sides. They are super easy to remove. The poster in here only added the material to the floor of the trunk. You need to do the whole thing....bottom and sides with fenderwells.

edub370 08-17-2012 01:59 PM

Quote:

Originally Posted by DCNISMO (Post 1874199)
To get to the rear fenderwell, you need to take all the panels out of the trunk and then take off the panels behind the seats too....then you can add the sound deading material to the rear fenderwell on both sides. They are super easy to remove. The poster in here only added the material to the floor of the trunk. You need to do the whole thing....bottom and sides with fenderwells.

i only got the free 10 sq ft so thats not an option. i guess i'll see what i can get to tomorrow

jpritche 08-17-2012 02:08 PM

Update: I installed roughly 30-40 sq ft. Today in the doors and in the back. First impression is wow. It has made a huge improvement so far. I will have more gopro videos later with decibel readings. The smell is basically non-existent. I was installing outside and never really smelled anything.

I would highly recommend this to anyone. It's a cheaper option than some of the other brands, but works EXCELLENT.


I will be installing more under the carpet underneath the seats next week.

Huck 08-17-2012 02:09 PM

Alright, I'm typing this on the computer, and then I'll add the pics from my phone. I suck at reviews, but I'll give it my best shot.

Customer Service:
The man I spoke to on the phone was very courteous and friendly. I asked him a few questions and he explained the answers in detail for me. I have nothing bad to say about this :)

Shipping:
It shipped the same day I called them, and arrived 3 days later. Everything was packed well, and the box included the GTmat, instructions with pictures, 2 GTmat stickers, and even a little roller. I thought the roller was a nice touch, and it made the job a lot easier than smoothing it all with your hands. I would have gotten tired of that pretty quickly. There was also a coupon in the box, if you like the product and you want to get some more then you can save $10 (I think that's what it was). Very pleased so far :)

Quality / Install:
I have to admit that I haven't had much experience with sound deadening material before, so I'm kind of a noob with this. But this stuff looks to be pretty good quality. It's got a little weight to it, but not too heavy. The adhesive side stuck well to the truck of the car and once on there was actually difficult to pull back off. It was my first time installing this kind of stuff so I honestly don't know if I did a good job, but I gave it my best. Feel free to critique my pics. The install seemed pretty straight forward, the stuff was pretty pliable and wasn't a PITA at all. I also heard people asking if there was a smell to it. This may sound stupid but I actually stuck it to my nose and didn't smell anything. Then, the next morning after the install I went back into my car and did a smell test. Nothing. I asked my wife to check it out. Nothing. Happy about this as well :tup:

Result:
Just with the 10sqft I can there's a noticeable difference. My exhaust is a little quieter, and the road noise is a little bit lower. I would think that if you got enough of the 80mil to do the whole trunk and the doors (50sqft?) sound would be reduced dramatically. I have also noticed slightly better bass response from my 12" Zenclosure in the back. I took a db measurment before I did this, but I haven't gotten to take one after so I don't know how the numbers have been affected. I'll probably be able to do that this sunday, then I'll post it up.

All in all for the money I believe this is a great product and a great value, and as soon as I get my components I'm going to be giving these guys a call back for some more of the 80mil. Thanks GTmat!

EDIT: on my phone now, here's the pics I took with my iPhone :)

http://i62.photobucket.com/albums/h9...46B94DFC46.jpg

http://i62.photobucket.com/albums/h9...46CF04061D.jpg

http://i62.photobucket.com/albums/h9...46E29AE473.jpg

GTMat 08-17-2012 02:10 PM

Quote:

Originally Posted by edub370 (Post 1874240)
i only got the free 10 sq ft so thats not an option. i guess i'll see what i can get to tomorrow

Hey edub370, if you need more to complete your project, we are more than happy to offer a discounted rate. Let me know! :)

GTMat 08-17-2012 02:15 PM

Thanks for the reviews jpritche and Huck! Glad to hear it's working out and helping ease the noise. :tup: If either of you need more to complete the projects, let me know and we can work on discount pricing. Can't wait for your pics and vids!


We would like to see if any of you are willing to post your reviews on our Amazon listings. If you don't mind, you find our listings here:
GT Sound Control @ Amazon.com:

Huck 08-17-2012 02:34 PM

I'll head over there a little layer :tup: thanks again for a good product and price :)


Sent from my iPizzle using magic and new-fangled science stuff

Huckleberry 08-17-2012 02:40 PM

Quote:

Originally Posted by DCNISMO (Post 1874199)
To get to the rear fenderwell, you need to take all the panels out of the trunk and then take off the panels behind the seats too....then you can add the sound deading material to the rear fenderwell on both sides. They are super easy to remove. The poster in here only added the material to the floor of the trunk. You need to do the whole thing....bottom and sides with fenderwells.

only thing i didn't hit was right above the wheels. Otherwise, i completed the majority of my trunk.

bigdog1250 08-17-2012 07:52 PM

Just got my sample today, will try to install and get a vid produced by the end of the weekend :)

Nut_N_Much 08-18-2012 05:30 PM

This is what I used to sound deaden my Sophie:hello:. I ordered off ebay 50 Sq Ft, it came in the mail with in 5 days. Came with the roller and some plastic tools to smooth it all out. I laid it from the Fire Wall all the way back to the trunk. Also did the roof, worked awesome. I have ART Test Pipes on Fast Intentions Carbon Fiber Exhaust cans (Loud inside cab)... After deadening I could talk on the blue tooth with out yelling.

The 50 foot roll was around 25 pounds. I put it on a scale before laying it out. My trunk had been done already by someone else but there were lots of gaps, and surface areas not covered. I laid G-Matt over it and used sound deadening spray to get in areas that are hard to reach. Makes a big difference. Once I finished I went over it all with a heat gun, made it more pliable and formed around tight corners and difficult areas.

Thanks G-Matt, if you come up with any new stuff, I'll test it for you !!!!

http://www.the370z.com/members-370z-...h-journal.html

PM me if you have question..:tup:

Install Pics as requested: Feel free to cruise my Albums.
http://www.the370z.com/members/nut_n...dle-cables.jpg
http://www.the370z.com/members/nut_n...0-dscf0566.jpg
http://www.the370z.com/members/nut_n...1-dscf0567.jpg

GTMat 08-19-2012 12:57 PM

Quote:

Originally Posted by Nut_N_Much (Post 1875861)
This is what I used to sound deaden my Sophie:hello:. I ordered off ebay 50 Sq Ft, it came in the mail with in 5 days. Came with the roller and some plastic tools to smooth it all out. I laid it from the Fire Wall all the way back to the trunk. Also did the roof, worked awesome. I have ART Test Pipes on Fast Intentions Carbon Fiber Exhaust cans (Loud inside cab)... After deadening I could talk on the blue tooth with out yelling.

The 50 foot roll was around 25 pounds. I put it on a scale before laying it out. My trunk had been done already by someone else but there were lots of gaps, and surface areas not covered. I laid G-Matt over it and used sound deadening spray to get in areas that are hard to reach. Makes a big difference. Once I finished I went over it all with a heat gun, made it more pliable and formed around tight corners and difficult areas.

Thanks G-Matt, if you come up with any new stuff, I'll test it for you !!!!

http://www.the370z.com/members-370z-...h-journal.html

PM me if you have question..:tup:

Wow, it looks awesome in your Z! Glad we could help you! Thanks to the great response we have received so far, any new products will be open to testing by you guys. :tup:


We would appreciate if all reviews and install pics could also be posted on our Amazon listings found here: GT Sound Control @ Amazon.com:

We are trying to build up the brand name. :)


Still offering the free samples if anyone else wants to try it out! :tup:

GTMat 08-20-2012 04:14 PM

Any updated reviews out there?


I heard a rumor that we might have some new products available for testing. :excited:

vermithrax 08-20-2012 04:49 PM

Still working on getting mine installed. I will post a review and photos, and a review on amazon as soon as I get the time to get it put in.

Huckleberry 08-20-2012 04:57 PM

Quote:

Originally Posted by GTMat (Post 1878392)
Any updated reviews out there?


I heard a rumor that we might have some new products available for testing. :excited:

what new products?

:hello:

GTMat 08-20-2012 05:03 PM

Quote:

Originally Posted by Huckleberry (Post 1878453)
what new products?

:hello:

All I heard was "liquid". :) I'll be sure to keep you guys updated. :tup:

Huckleberry 08-20-2012 05:56 PM

is there a waiting list?

:happydance:

bigdog1250 08-20-2012 06:56 PM

FYI, I installed the 10 sq. ft. sample this past weekend and shot some video. Not sure when I'll have it edited and ready to post but it should be sometime mid week.

Results:

- Installed in the trunk
- Noticeably quieter at idle
- Really easy to install and adhere
- Sample came in just a few days, great customer service!
Used an iPhone app as a basis to measure the decibel levels before and after. At idle before = 56, after = 52

The main reason I wanted to test the deadening material was to reduce the drone created by my F.I. exhaust at about 70mph (2800rpm) on the freeway. When you step on the gas a bit there is a tone that reverberates in the cabin and is kinda annoying. While I don't mind it much, my passengers do.

@70 mph before the install = 77-82 decibels, after = 77-78.

So there was a measurable difference, however it wasn't really noticeable to me, at least not while on the freeway. I'm sure if I installed some more in the roof/hatch area, it would greatly help.

All video and measurements were taken on the same roads and measured multiple times, so it should be fairly accurate.

ericzmyers 08-20-2012 10:26 PM

i bought and installed 50 sqft. pulled the whole interior and got it done in a day.

- Product was easy to work with.

- roller was absolute garbage. Broke within and hour, too much with the man hands i guess. i bought a tool box caster and used that to roll a majority of the product flat.

- there has been a little odor in the car here and there but barely noticeable.

GREAT PRODUCT, WELL WORTH THE PRICE.

SEND ME MORE STICKERS!

thinking of buying a little bit more and doing the roof.

Cmike2780 08-21-2012 09:01 AM

I installed the sample you guys sent over the weekend and didn't get a chance to drive the car until today. Since 10 sq.ft. isn't a whole lot to work with, I applied it to where I thought most of the noise was coming from, the rear wheel wells. 10 sq.ft. was enough to cover both sides, with a little left over. If you guys get just the sample to try it out, I suggest this area because you do reduce a noticable amount of road noise. It just about knocked out those little "ticking" noises hitting the wheel well when driving over not so clean road. It might just be me, but my exhaust also sounds "cleaner" since I'm not hearing as much road noise.

I'll definitely order more of this stuff in the future. I just need to set aside time to do it because it can be time consuming to install. Overall, the product does work, but there are other areas that need to be addressed.

I'll add some pics later.

GTMat 08-21-2012 10:35 AM

Quote:

Originally Posted by Huckleberry (Post 1878509)
is there a waiting list?

:happydance:

Not just yet, but we will definitely let you 370Z guys know about it once available!

Quote:

Originally Posted by bigdog1250 (Post 1878564)
FYI, I installed the 10 sq. ft. sample this past weekend and shot some video. Not sure when I'll have it edited and ready to post but it should be sometime mid week.

Results:

- Installed in the trunk
- Noticeably quieter at idle
- Really easy to install and adhere
- Sample came in just a few days, great customer service!
Used an iPhone app as a basis to measure the decibel levels before and after. At idle before = 56, after = 52

The main reason I wanted to test the deadening material was to reduce the drone created by my F.I. exhaust at about 70mph (2800rpm) on the freeway. When you step on the gas a bit there is a tone that reverberates in the cabin and is kinda annoying. While I don't mind it much, my passengers do.

@70 mph before the install = 77-82 decibels, after = 77-78.

So there was a measurable difference, however it wasn't really noticeable to me, at least not while on the freeway. I'm sure if I installed some more in the roof/hatch area, it would greatly help.

All video and measurements were taken on the same roads and measured multiple times, so it should be fairly accurate.

Bigdog, thanks for the review! Glad to hear that product did help out even if only on a small scale. If you need to order more to complete the project, please let me know so that I can get you a discounted price. :tup:

Quote:

Originally Posted by ericzmyers (Post 1878895)
i bought and installed 50 sqft. pulled the whole interior and got it done in a day.

- Product was easy to work with.

- roller was absolute garbage. Broke within and hour, too much with the man hands i guess. i bought a tool box caster and used that to roll a majority of the product flat.

- there has been a little odor in the car here and there but barely noticeable.

GREAT PRODUCT, WELL WORTH THE PRICE.

SEND ME MORE STICKERS!

thinking of buying a little bit more and doing the roof.

Hi Eric, sorry about the roller issue! We are making the switch fairly soon to a more durable product. :tup: If you need to make a purchase to complete your project, I can definitely work out a discount. And sure, we can send more stickers with it! :)

Quote:

Originally Posted by Cmike2780 (Post 1879320)
I installed the sample you guys sent over the weekend and didn't get a chance to drive the car until today. Since 10 sq.ft. isn't a whole lot to work with, I applied it to where I thought most of the noise was coming from, the rear wheel wells. 10 sq.ft. was enough to cover both sides, with a little left over. If you guys get just the sample to try it out, I suggest this area because you do reduce a noticable amount of road noise. It just about knocked out those little "ticking" noises hitting the wheel well when driving over not so clean road. It might just be me, but my exhaust also sounds "cleaner" since I'm not hearing as much road noise.

I'll definitely order more of this stuff in the future. I just need to set aside time to do it because it can be time consuming to install. Overall, the product does work, but there are other areas that need to be addressed.

I'll add some pics later.

Hey Mike, we'd like to know about the other issues you had if possible. Thanks for giving us a shot and thanks for your review and upcoming pictures! Same as the guys above, contact me for discount prices when ready to order. :)



I'm sure I've posted it lots of times already but if any of you could provide your reviews on our Amazon listings, we would greatly appreciate it! Listings can be found here: GT Sound Control @ Amazon.com:

Cmike2780 08-21-2012 10:56 AM

Quote:

Originally Posted by GTMat (Post 1879483)
Hey Mike, we'd like to know about the other issues you had if possible. Thanks for giving us a shot and thanks for your review and upcoming pictures! Same as the guys above, contact me for discount prices when ready to order. :)

Sorry, I meant other noise issues with the car, not your product.

GTMat 08-21-2012 11:22 AM

Quote:

Originally Posted by Cmike2780 (Post 1879535)
Sorry, I meant other noise issues with the car, not your product.

Awesome then! :tup:

Huck 08-22-2012 10:17 AM

Yeah I can confirm those numbers, I used a studio db meter and on average it cut out 3db at idle, and 5-6db at 70mph. Not bad for just 10sqft of the 50mil. Image what it would sound like if you had 100sqft of the 80mil!


Sent from my iPizzle using magic and new-fangled science stuff

edub370 08-22-2012 10:20 AM

i cant wait till i get a free minute to put mine in

SoFloZ 08-22-2012 10:22 AM

Would this help for my drone from the shorties

GTMat 08-22-2012 10:25 AM

Quote:

Originally Posted by SoFloZ (Post 1881043)
Would this help for my drone from the shorties

Sure will! Give me a call to get your sample sent out! 1-855-487-6865 :tiphat:

snea 08-22-2012 11:43 AM

I was able to complete the GTMat installation yesterday. First, I apologize for the grainy pics and bad lighting. It was raining both days while I did this so I just left the car in the garage.

Removing the interior panels:
http://i1076.photobucket.com/albums/...ttingready.jpg

Everything removed (the next day lol):
http://i1076.photobucket.com/albums/...ovedpanels.jpg

GTMAT installed!
http://i1076.photobucket.com/albums/.../completed.jpg

I did have a few leftover strips that I slapped over the wheel wells after the last pic. Using the 10 sq. ft. I was able to cover maybe 1/2 the hatch area. It looks like more, but there is a lot of vertical surface left uncovered. The product is pretty easy to work with and total installation time probably ran 2.5 hours. I'm sure I could go quicker now after working with the product and understanding how to remove all the interior panels. I was able to mold it into place without much trouble leaving very few points where contact isn't 100%. I can't say I'm looking forward to completing the job since the remaining areas are going to be more difficult, but after hearing the results of partial coverage, it is something I plan on doing.

My exhaust is pretty loud, and the tire/wheel combination definitely adds to the road noise. I only have the base stock sound system (something else on the to-do list) so I can't comment on any improvement there. Upon starting the car, I immediately noticed the exhaust was slightly quieter inside the cabin. The road noise reduction was also apparent, but not as noticeable. I didn't measure decibels, but there was some noticeable improvement from partial coverage on a very loud car. I do believe the additional reduction in noise with 100% luggage and door coverage will be worth it and would be even more so for a stock Z.

I may wait a couple of months for the weather to cool off and hopefully do some speaker replacement at the same time, but I will be completing the job using GTMat.

GTMat 08-22-2012 12:03 PM

Quote:

Originally Posted by snea (Post 1881182)
I was able to complete the GTMat installation yesterday. First, I apologize for the grainy pics and bad lighting. It was raining both days while I did this so I just left the car in the garage.


I did have a few leftover strips that I slapped over the wheel wells after the last pic. Using the 10 sq. ft. I was able to cover maybe 1/2 the hatch area. It looks like more, but there is a lot of vertical surface left uncovered. The product is pretty easy to work with and total installation time probably ran 2.5 hours. I'm sure I could go quicker now after working with the product and understanding how to remove all the interior panels. I was able to mold it into place without much trouble leaving very few points where contact isn't 100%. I can't say I'm looking forward to completing the job since the remaining areas are going to be more difficult, but after hearing the results of partial coverage, it is something I plan on doing.

My exhaust is pretty loud, and the tire/wheel combination definitely adds to the road noise. I only have the base stock sound system (something else on the to-do list) so I can't comment on any improvement there. Upon starting the car, I immediately noticed the exhaust was slightly quieter inside the cabin. The road noise reduction was also apparent, but not as noticeable. I didn't measure decibels, but there was some noticeable improvement from partial coverage on a very loud car. I do believe the additional reduction in noise with 100% luggage and door coverage will be worth it and would be even more so for a stock Z.

I may wait a couple of months for the weather to cool off and hopefully do some speaker replacement at the same time, but I will be completing the job using GTMat.

That is one good looking Z! Out of curiosity, what exhaust set up are you running?
Once you are ready to order, just let me know and I'll hook you up with a discount. Thanks for trying us out! :tup:

snea 08-22-2012 05:09 PM

Invidia Gemini with Invidia test pipes. Thanks Tracie, I'll let you know when I'm ready to order. :)


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