Sound deadening - Toyota FJ Cruiser Forum
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post #1 of 23 (permalink) Old 06-20-2019, 06:00 AM Thread Starter
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Sound deadening

I tried searching but didn't couldn't find what I was looking for. Has anyone done a full sound deadening install? What did you use how much did you buy? Would 150 sqft be enough or too much? Results, pics?

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post #2 of 23 (permalink) Old 06-20-2019, 06:12 AM
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Re: Sound deadening

I bought 100 square feet of Fatmat Rattle Trap and covered the floor and sides of the FJ from the back of the front seats back. I did the rear doors, the cargo floor, under the rear seats, and all the way up to the headliner on the sides. I still have quite a bit left and sometime soon I'm going to continue the floor and sides around the front seats, the four side doors, and the firewall. If there is still some left at that point I'll drop the headliner and work on the roof.

I'd say 150 sq ft would do the whole FJ, depending on how much you apply. You only need 25% of each body panel covered to dampen the vibrations and deaden sound. I put on much more than that.

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post #3 of 23 (permalink) Old 06-20-2019, 06:22 AM
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Re: Sound deadening

Describe your before vs after impressions.
Was it worth it?

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post #4 of 23 (permalink) Old 06-20-2019, 06:26 AM Thread Starter
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Re: Sound deadening

Thanks for the info! I read that fatmat was asphalt based. Did it smell? What did you pay?

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post #5 of 23 (permalink) Old 06-20-2019, 06:29 AM
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Re: Sound deadening

It's definitely more quiet in the rear of the FJ. I've been converting my FJ into a 4WD camper so I also added fiberglass insulation between the frame and body panels in the rear, which of course further deadens the sound. I decided to use the material to deaden outside sounds since my goal is to have a comfortable sleeping area in the rear of the FJ. I want to eliminate noises from other cars if I'm sleeping at a highway rest stop, for example. I think doing the floor under the front seats (where the transmission is) and doing the side doors will help a lot to eliminate road noise.


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post #6 of 23 (permalink) Old 06-20-2019, 06:34 AM
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Re: Sound deadening

The fatmat has a black, sticky adhesive but I don't think it's asphalt based. It has no odor, even in the triple digit Utah and Arizona summers. I ordered it from Amazon. Looking at it now, I only bought 50 square feet, not 100. I remember now thinking that what I had left and another 25 square feet would finish the whole FJ. It looks like right now it's $109.95 for 50 sq ft on Amazon.

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Last edited by crazysanman; 06-20-2019 at 06:39 AM.
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post #7 of 23 (permalink) Old 06-20-2019, 07:00 AM
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Re: Sound deadening

Rattle Trap is what I used. One 50ft roll was able to cover the front doors, rear door and flooring in the trunk area. I had pics of it but cant seem to find them now.
I have another 50ft roll in the garage that I plan on doing the roof with. After that, I will buy another 50ft to do the floor and rear suicide doors.

Was it worth it? Absolutely. I have a 1400 watt Rockford Fosgate system in my FJ so the rattle trap made a huge difference with sound quality and rattles caused by vibration.
If I could do it again, I would have started with the headliner. Thats where most of the noise from the roof rack, rain, and bass flex are coming from.

Yes, I think 150ft would be enough to deaden the FJ.

If your budget allows, look into Second Skin. They are supposedly the best for sound deadening and are recommended by most in the car audio community. Sadly, my budget doesnt allow for Second Skin products

https://www.secondskinaudio.com/
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Last edited by Irving Zisman; 06-20-2019 at 07:05 AM.
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post #8 of 23 (permalink) Old 06-20-2019, 07:19 AM Thread Starter
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Re: Sound deadening

My budget won't allow for second skin unfortunately. I love the fact that it's made in the USA. I am going to go with noico 80 mil. Figured I would do it top to bottom. Once the seats are out is the vinyl floor a pain to remove/reinstall? Off topic I Was thinking of hiding my 2 amps under the front seats? Anyone else try this?

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post #9 of 23 (permalink) Old 06-24-2019, 08:24 AM
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Re: Sound deadening

Quote:
crazysanman previously said: View Post
I'd say 150 sq ft would do the whole FJ, depending on how much you apply. You only need 25% of each body panel covered to dampen the vibrations and deaden sound. I put on much more than that.
^ this. The manufacturer only recommends a certain amount of the butyl material to dampen vibrations. Then use sound insulation on top 100% coverage like Noico green 170 mil liner. When I redo mine, I am going to use the Noico liner on top of the butyl layer.

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post #10 of 23 (permalink) Old 06-24-2019, 08:47 AM
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Re: Sound deadening

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