sound damping at partsxpress? Any good?
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Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=62064
Printed Date: May 06, 2024 at 8:56 AM
Topic: sound damping at partsxpress? Any good?
Posted By: Tegpilot
Subject: sound damping at partsxpress? Any good?
Date Posted: August 25, 2005 at 9:28 PM
Hey guys, newbie question, I haven't used any deadening material in my car and am wanting to do "something" but don't have the bucks to spend on dynamat. Has anybody ever tried this stuff???https://www.partsexpress.com/pe/showdetl.cfm?&DID=7&Partnumber=268-010 For a 10x10" sheet, thats pretty cheap I've found. Even If I use like 3 layers around my door drivers, it seems like an absolute fraction of the price of name brands. And you can buy the big sheets for around 18 dollars or something like that! Let me know, thanks!
Replies:
Posted By: haemphyst
Date Posted: August 26, 2005 at 12:35 AM
If I had to guess, and judging by the appearance, it is just Dynamat - the regular kind. I tried it, I didn't like it. Oh sure it worked for a LITTLE while, till the adhesive started failing. Ah, that wonderful Bakersfield sun! And I don't mean it was coming off the panels; the adhesive was sticking to the panels, and the Dynamat was falling off the adhesive!!!  Needless to say, I won't be using regular Dynamat again - especially after I have now rematted my entire car with Extreme! Way better stuff... ------------- It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."
Posted By: Tegpilot
Date Posted: August 26, 2005 at 2:11 AM
no I don't thinks its dynamat, they would have to disclose that if it is. I think it the same type of thing obviously, just didnt' want to buy something that stinks. I know I know, it's cheap I get what I pay for, but sometimes cheap works best, *sometimes* Anybody else???
Posted By: sedate
Date Posted: August 26, 2005 at 7:58 AM
Tegpilot wrote:
no I don't thinks its dynamat, they would have to disclose that if it is
What? Is PET milk different from MarvaMaid? What about is difference between the steering wheel on your car and mine?
The little brand embossed in the center of it.
Dynamat is a brand, not a material. The material is an adhesive attached to a rubber coating. The stuff can be resold in all kinds of ways. Same sort of material is used in roof construction.. all kinds a stuff.
Either way, there about a bazzillion cheapo alternatives to Dynamat... I know you can Dynamat Extreme (w/o the logo) for like next to nothing from Grainger but I can't remember the Part#... it's buried in the forums here.. I'll poke around a bit and see if I can't find it. ------------- "I'm finished!" - Daniel Plainview
Posted By: sedate
Date Posted: August 26, 2005 at 8:07 AM
Here.
https://www.mcmaster.com/
Search for "Polymeric Mastic" ... now open the little [+] next to the search results, and click "Adhesive Dampning Sheets"
Dynamat Extereme, no logo.
Thank stevdart.
 ------------- "I'm finished!" - Daniel Plainview
Posted By: stevdart
Date Posted: August 26, 2005 at 12:04 PM
That stuff is like regular Dynamat, and probably the stuff at PartsExpress. The glue does fail after a year or so, it seems, but just a little. $42 for 36 sq ft is the best bargain you will find though. I use it if I'm footing the bill. Best bet: clean the panels with acetone, and apply a light coat of 3M spray glue to the panel...let it tack up...before applying the sheet.
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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: Tegpilot
Date Posted: August 26, 2005 at 12:56 PM
cool, that stuff at mcmaster is the same thickness and all, just one question, I'm not stupid or anything, but if I bought quantity 10 of the 10"x10" of the partsxpress stuff, that works out to roughly a 50"x50" sheet correct, or am I wrong?? If this is the case then 50"x50" is @ 1.79 only $17.79. where the mcmaster stuff is 34"x52" for $14.00, oh yeah stevdart, how did you calculate 36sq/ft for 42.00????
Posted By: haemphyst
Date Posted: August 26, 2005 at 1:21 PM
No, quantity 10 of the 10x10 would give you 100x10 or 50x20, not 50x50. It's 1000 square inches, not 2500.
34 x 52 = 1768 square inches for 14.00
1768 (square inches) = 12 square feet
12 square feet x 3 = 36 sq ft
14.00 x 3 = 42.00
5 times the area, for better stuff, for less money...
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It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."
Posted By: phatx96xaccord
Date Posted: August 26, 2005 at 1:30 PM
i think you might want to stay away from asphalt based sound deadening supplies.
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would u like your chicken original or extra crispy?
Posted By: Tegpilot
Date Posted: August 26, 2005 at 1:48 PM
thanks haemphyst, that's what I get for thinking, you might think being a commercially licensed pilot I might be able to figure that out without straining my brain. Anybody wanna go flying??? hahaha Why is that Phatx??? is the stuff in question at mcmaster asphalt based? I think it is.
Posted By: phatx96xaccord
Date Posted: August 26, 2005 at 2:18 PM
asphalt based is lower grade stuff, doesnt hold up to heat as well as butyl based deadeners. There fore it will be more likely to fall off. i believe the regular dynamat is asphalt based, the extreme is butyl based. Second skin makes a good product that is butyl based. I am still looking for a deadener that is cheap, but after reading i like to get a butyl based product, but they tend to run more in cash. i think the cheapest i have seen is RAAMmat. they have a product that is butyl based.
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would u like your chicken original or extra crispy?
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