Knock off dynamat opinion?
Thread Starter
Pro
Joined: Apr 2007
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From: Chester VA
Knock off dynamat opinion?
I came across this knock off brand dynamat sound/heat insulator, was wondering if anyone has seen or used it. It's pretty cheap, 100 sq feet should be enough to do the Vette and my Mercedes for $160, real dynamat would be like 4 times the price. I'm not into big stereos or anything, just after a quieter, tighter interior.
Ebay Link
Hmmm, just found this one too, 100 sq feet for $95. Too cheap to be good?
Link 2
Ebay Link
Hmmm, just found this one too, 100 sq feet for $95. Too cheap to be good?
Link 2
Last edited by wiseman79; Sep 2, 2009 at 06:09 PM.
Pro
Joined: Jun 2005
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St. Jude Donor '09, '24
The products in those links looks like that is rolled asphalt that you can buy in any home improvement store. It is used in roofing/flashing applications. Dynamat is basically the same material as asphalt roofing shingles. I have done the reflectrix route and will never do that again. Way to time consuming and the spray route looks like the way to go. You can get into all nook and crannies and behind the door pillars too. The spray method will work great on the doors also. Lizard Skin and Dynamat both make spray on sound deadeners and heat barriers. The Lizard Skin guys are 2 different applications and the Dynamat is all combined into 1. The Dynamat spray on recommends almost 3/4" (.70)thickness. At 3/4" thickness with Dynamat you should be able to hear the radio as you go down the road. The Dynamat is cheaper then the other product and the application wand is a 1/3 the price, houstonvett
Melting Slicks
Joined: May 2006
Posts: 2,590
Likes: 403
From: Nashville TN
St. Jude Donor '09
There may be a difference, but I bought a similar product called B-Quiet at a fraction of the cost of Dynamat. I did a side-by-side visual comparison and they looked the same to me. I covered my entire interior with this stuff and it really helped with temps and noise. I'm not sure I answered your question, but I think there are cheaper products out there that are just as good as dynamat IMHO.
Thread Starter
Pro
Joined: Apr 2007
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From: Chester VA
I may give this a shot then. Side Pipes + Convertible + highway speeds - overdrive = no conversation or hearing the radio. I've looked into the spray on stuff, I'm a little worried I'd screw it up. Isn't there a roll on product that's similar?
Another question, I was planning on using undercoating on the bottom of the floorboards for more sound deadening. I've been scrubbing away for a couple days prepping the area. I've heard good and bad about undercoating, any opinions on putting it on the floorboards? I don't plan on putting it on the frame.
Another question, I was planning on using undercoating on the bottom of the floorboards for more sound deadening. I've been scrubbing away for a couple days prepping the area. I've heard good and bad about undercoating, any opinions on putting it on the floorboards? I don't plan on putting it on the frame.
Last edited by wiseman79; Sep 2, 2009 at 07:32 PM.
Melting Slicks
Joined: Jul 2005
Posts: 2,060
Likes: 46
From: winter haven florida
St. Jude Donor '12
this stuff is not for heat. it is for sound only. the thick tary stuff absorbs sound and vibration and needs to be agaisnt the surface you are wanting to kill sound from. i am guessing the shiny smooth stuff helps reflect the sound from the speakers back into the car.
Melting Slicks
Joined: Jul 2005
Posts: 2,060
Likes: 46
From: winter haven florida
St. Jude Donor '12
I may give this a shot then. Side Pipes + Convertible + highway speeds - overdrive = no conversation or hearing the radio. I've looked into the spray on stuff, I'm a little worried I'd screw it up. Isn't there a roll on product that's similar?
Another question, I was planning on using undercoating on the bottom of the floorboards for more sound deadening. I've been scrubbing away for a couple days prepping the area. I've heard good and bad about undercoating, any opinions on putting it on the floorboards? I don't plan on putting it on the frame.
Another question, I was planning on using undercoating on the bottom of the floorboards for more sound deadening. I've been scrubbing away for a couple days prepping the area. I've heard good and bad about undercoating, any opinions on putting it on the floorboards? I don't plan on putting it on the frame.
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Thread Starter
Pro
Joined: Apr 2007
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From: Chester VA
Well I ended up going with this- Clicky. It's a 100 sq feet and 80mil thick and comes with some prep cleaner and roller. I'll update when I receive it. I won't know how effective it is for a while since I just pulled the car apart for an early start on winter projects, sound proofing being one of them.
Racer
Joined: Dec 2007
Posts: 297
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From: El Dorado Hills California
Just bought a 50 sq ft roll of Fat Mat off an EBay store for $129
Its about 1/8" of butyl rubber and the aluminum face. Sticks well. Won't know how well it works until project is finished. Let you know about 2012!
Blain
Its about 1/8" of butyl rubber and the aluminum face. Sticks well. Won't know how well it works until project is finished. Let you know about 2012!
Blain
Last edited by Blain; Sep 3, 2009 at 12:04 AM.
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St. Jude Donor '09, '24
I have done the reflectrix route using the 3M 8001 glue on my 78. I will use the Dynamat spray on next time. I don't think it will be that hard to spray on. Wiseman79 Eastwood makes a good undercoating remover. Spray it on and it breaks down the glue thats in the undercoating, works very well. These are some of the pics of the reflectrix job, houstonvett
Last edited by houstonvett; Sep 3, 2009 at 11:08 AM.
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St. Jude Donor '09, '24
Yes, the 3M 8001 is the glue to use. Bonds very quickly which is important around radiused pieces like the wheelwheels. Once it cures it doesn't move, super strong, I wouldn't use anything else Droptop_Rob. 3M 8001 costs a little more but well worth spending the extra money for the good stuff, houstonvett
Burning Brakes
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Pro
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St. Jude Donor '09, '24
Wiseman79 I will be spraying the Dynamat on the bottom of the car. I will let it cure for about a week and then go back and undercoat the bottom of the car. With the same gun that I shoot the Dynamat with, I can shoot the top line undercoating. The undercoating that comes out of a spray can doesn't perform as well as the spray on type. The Dynamat is in a water soluble form, so just in case I will make sure the Dynamat never gets exposed to water using the undercoating for a sealant, houstonvett
Thread Starter
Pro
Joined: Apr 2007
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From: Chester VA
Thanks for the info. For all interested in the subject I found this website that has some great info- http://www.sounddeadenershowdown.com/
Drifting
Joined: Jul 2006
Posts: 1,871
Likes: 6
From: Sault Ste. Marie Ontario
I paid just under $200 to get two fifty foot rolls of FatMat delevered to Canada. I think in the US you can pick it up for about $150.
The stuff went in easy and seems to be doing a good job.
The car is a quiet as the pipes will allow
The stuff went in easy and seems to be doing a good job.
The car is a quiet as the pipes will allow
Last edited by eastltd; Sep 3, 2009 at 10:51 PM. Reason: typo
