sound deadening material alternative?
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=40154
Printed Date: July 06, 2025 at 1:16 PM
Topic: sound deadening material alternative?
Posted By: megavolt121
Subject: sound deadening material alternative?
Date Posted: October 02, 2004 at 2:44 AM
Im looking to cheaper alternatives of sound deadning. I just dont' really want to pay the price for dynamant. Anyways the other day I saw some vinyl based pads,which were still around 3-4 bucks a sq foot. So I started thinking, what if I put a thick layer of liquid latex down? Anyways have any suggestions/thoughts/comments on this?
Replies:
Posted By: stevdart
Date Posted: October 02, 2004 at 7:43 AM
Here's the best cheap alternative I've found: https://www.mcmaster.com/asp/enter.asp?pagenum=3270 Adhesive-backed damping sheets; polymeric mastic. Sheets are 12 sq ft for $14.62 each. I got next day delivery for $11 that covered the cost of shipping 3 sheets ground ( a fairly heavy box!). I got best results by cleaning the metal surfaces of any dust, and adding a layer of 3M Super77 spray glue to the surfaces of the sheet metal, and used heat to mold the sheets into the crevices. ------------- Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
Posted By: hammondc
Date Posted: October 02, 2004 at 10:04 AM
i second that. I started some folks on here to that website a few months back. The roll on damper works great too!! TONS on damping stuff on there for cheap. Everything from sound damping foam to vibration damping sheets.
Posted By: DYohn
Date Posted: October 02, 2004 at 10:11 AM
Or you could do what was done in a 320i I just finished helping with. The owner had used chewing gum and stuffed wads into every crevice and between every panel. Must have been ten pounds of the stuff in there! ------------- Support the12volt.com
Posted By: thapimpfromchi
Date Posted: October 02, 2004 at 10:33 AM
haha. Dyohn ur crazy man. lol. Anyways, I used vehicle Undercoat in my car. Its only like 3.50 a bottle at autozone. works great too.
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1990 Honda Civic HB:
Clarion DXZ545MP H.U.
2- 6.5" Power Acoustik interiors
Diamond Audio 600.1 amp
Diamond Audio 15" M6MKII
Pyramid PB881X 4 CH. Amp
Posted By: kfr01
Date Posted: October 02, 2004 at 3:37 PM
I did not like the mcmaster stuff at all. It was not nearly as easy to work with as brown bread, dynamat xtreme, or raammat. If there were any bubbles at all the mat had the tendency to peel off in the heat. https://www.raamaudio.com/ is the best low cost yet acceptable solution to me. ------------- New Project: 2003 Pathfinder
Posted By: aggie altima
Date Posted: October 02, 2004 at 7:21 PM
I second the RaamMat from raamaudio.com, I used it on my car and it works just as well as dynamat xtreme.
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Jon
Don't like rockford subs? Then don't look at my car =)
Posted By: jeffchilcott
Date Posted: October 02, 2004 at 8:45 PM
i always use brown bread and rubberized undercoatin
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2009 0-1000 Trunk WR 154.0DB 2009 1001+ Trunk WR
2007 USACI World Champion
2007 World Record
2006 USACI Finals 2nd Place
Posted By: megavolt121
Date Posted: October 03, 2004 at 12:37 PM
What's brown bread?
Posted By: jeffchilcott
Date Posted: October 03, 2004 at 2:21 PM
kinda like dynamat but 1000% better. It sticks and forms to about any surface countour, and it will not fall of no matter what if applied properly
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2009 0-1000 Trunk WR 154.0DB 2009 1001+ Trunk WR
2007 USACI World Champion
2007 World Record
2006 USACI Finals 2nd Place
Posted By: kfr01
Date Posted: October 03, 2004 at 3:30 PM
Unfair to compare it to regular dynamat. Dynamat Xtreme and Brown Bread are very similar.
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New Project: 2003 Pathfinder
Posted By: jeffchilcott
Date Posted: October 03, 2004 at 5:36 PM
i havent dealt with the dynamat xtreme, I order the brown bread for less then the price of normal dynamat.
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2009 0-1000 Trunk WR 154.0DB 2009 1001+ Trunk WR
2007 USACI World Champion
2007 World Record
2006 USACI Finals 2nd Place
Posted By: MBZ oe
Date Posted: October 04, 2004 at 12:00 PM
I just did a honda with the brown bread and found it very comparible to Dynamat X-treme.
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BOOM, BOOM, BOOM BOOM....
Posted By: boxmaker85
Date Posted: October 04, 2004 at 1:45 PM
Where does someone get the brown bread? Any perticular low-cost places to checkout? Need something for mine.
Posted By: 2ndiinone
Date Posted: October 04, 2004 at 1:53 PM
The cheapest, most inexpensive and easiest way is exactly what you said. Rubberized undercoating. I just used Dynamat extreme and everywhere I couldnt get I used the rubberized undercoating. I really wonder how big of a diff it is from the Dynamat and Undercoating.
Posted By: DYohn
Date Posted: October 04, 2004 at 2:01 PM
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