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Sound damping material

Discussion in 'Car Audio / Security / Electronic Accessories' started by seanjuan, Sep 17, 2003.

  1. seanjuan

    seanjuan Senior Member

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    I want to get some decent sound damping material, but I don't think that dynamat is all it's cracked up to be especially for that price

    I'm thinking of either getting brown bread or Fat Mat
    both can be found on ebay for a much better price than DM

    70sqft of brown bread would be $155
    100sqft of fat mat would be $120

    any body have experience with either of these or have thoughts on the whole concept of sound deadening?

    thanks
     
  2. hcivic.com

    hcivic.com Senior Member

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    all that they are, are roofing tar mat found at a hardware store for 1/4 the price i sild the shit on ebay for big cash till i felt guilty and quite.


    get lighting audion liquid damener it the best and cheapest you spray it on so the install is a hell of alot easyier
     
  3. seanjuan

    seanjuan Senior Member

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    yeah, I know about the whole roofing tar paper thing and I know enough not to pay squat for that stuff nor do I want to buy it for cheap for my car because it smells like tar.....

    this is one reason I wanted to go with one of those two companies because I believe that both of them claim their products have no smell

    can anyone confirm this?
     
  4. TurboMirage

    TurboMirage YEEAAAHHH VIP

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    i bought the fatmat and covered my civic in it, as well as filled the quarters and such with expanding foam. as is with the dynamat, it smells, but not as long as the dynamat did. it actually stuck better to the metal than dynamat did as well. make a sizeable difference.
     
  5. seanjuan

    seanjuan Senior Member

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    good to know
    how long did it take for the smell to go away?

    how many square feet did it take you to cover the car?
    floor,doors,trunk(hatch whatever)

    thanks
     
  6. 92LScivic

    92LScivic Member

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    the best way to go is to strip your interior and go to someone who does sprayin bed liners and have them spray it. Its a little more expensive but by far the best way to go
     
  7. TurboMirage

    TurboMirage YEEAAAHHH VIP

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    i paid 130 shipped for 70sq feet. came with a knife and a roller. i used ~45 sq feet to do up my car. i think both rolls together weigh 30lbs, so its not too big of a weight gain.
     
  8. 2b's

    2b's Junior Member

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    Here is some newb advice. I have installed systems for 13 years.

    1) Buy a bottle of rubbing alchohol and wipe down all panels to be deadened.

    2) Buy an adequate amount of quality carpet padding and some good spray adhesive(3m).

    3) Cut and paste (well glue).

    This really works good especially if cost is an issue. Minimal smell and no heat gun! I would recomend using dynomat or equivalent for the trunk area (trunk lid and spare tire bay). The side panels can use the carpet padding. There is not going to be enough vibration in the cabin for heavy asphalt matting, so the carpet padding will suffice for quiteness. The only road noise I have is from the lack of a catalytic converter. :D Dynomat offers a trunk kit that will do you good for about $75. Total cost would be around $100. I hope this helps.
     
  9. h22a_in_a_si

    h22a_in_a_si Junior Member

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    take out your back seat, add four ported 12" kicker solo-baric L7's facing foward, two autotek stealth 1500's, two yellow tops, two caps= 155.9dbs in a prelude, no mats/foam, no rattle. SIK
     
  10. MaaseyRacer

    MaaseyRacer Senior Member

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    Fat Mat gets my vote, my hatch does not rattle, but my old jetta did, and Fat Mat took care of it, and the smell was not super strong and did not last more than a week.
     
  11. quicksi

    quicksi Senior Member

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    DO NOT use this unless you want your car to rot out from underneath and around you. If you use Carpet padding, insulation or anything like that ,IF it gets wet, it will stay wet for an extended period of time (it CAN get damp with humidity and when the temprature drops, it can get very wet) it will rot out your body panels......
     
  12. 2b's

    2b's Junior Member

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    You just made my left eye explode! I guess then that the oem carpeting and seats will rot as well. Unless you hose out your car this will NOT happen. It's behind the plastic panels and will not get wet!!!

    Im not feeling well, must lay down.
     
  13. TurboMirage

    TurboMirage YEEAAAHHH VIP

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    wtf??


    the padding gets my vote as well, but much alike quicksi... trunk areas or even as my mirage just recently demonstrated, window leaks can lead to foam wetness. (did that sound dirty?) i used a hair dryer to dry out the carpet best i could after i pulled it up to make sure nothing was going to rot. :D
     
  14. mdanielswv18

    mdanielswv18 Junior Member

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    The best deadening material would have to be the spray in type, but if you are looking for something cheaper than Dynamat, try searching for V-Block. We use it at the stereo shop I used to work for. It does pretty good at stopping some of those annoying rattles!
     
  15. defaced

    defaced Junior Member

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    housing insulation that they use in the walls of houses when they're being built works really good. Get about a 4ft. roll at Lowes or Home Depot for about $5. That's what I have in my rear deck panel around my 6x9s and in my door panels. Works really good.
     
  16. TurboMirage

    TurboMirage YEEAAAHHH VIP

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    im all set on free-air fiberglass. :blink:
     
  17. Circuit

    Circuit Member

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    Try Silencer... you can buy it from Circuit City. Basically, it does the same thing dynamat does exept in a different way. Dynamat stops vibrations by filing the space with a lot of material. Silencer works in a different way. Instead of packing it with a lot of material, it catches the sound waves and converts them into heat. This is nice because 1) it stops vibrations 2) it's MUCH lighter... just a thought. I got some for my ride and it works well. to think, it only weighs down my car by 10 pounds :lol:
     
  18. TurboMirage

    TurboMirage YEEAAAHHH VIP

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    dynamat isnt all that heavy. 75sq feet weighs only 21lbs.
     
  19. Circuit

    Circuit Member

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    for one layer... depending on the power of your subs you may need 2 layers, some people like 1 layer of extreme and 2 layers of original... :unsure:
     
  20. TurboMirage

    TurboMirage YEEAAAHHH VIP

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    i had 2 layers in my civic and used ~60 sq feet.
     
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