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Who has experience with Dynamat, Hushmat, fat mat, etc

Kern Dog

Kern Dog

Life is full of turns. Build your car to handle.
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I asked this question here long ago and I can't find it anywhere. I'm planning on another long trip in a few weeks and I want to quiet the car down for a more comfortable ride.
I have a 70 Charger with a 440/493, headers with Flowmaster mufflers, 727 automatic with a GV OD. I also have a modest priced 4 speaker stereo.
I've read several threads about the quality of Dynamat. My goals here aren't too high though. I'm not looking to achieve a zero decibel experience. I just want some reduction in road noise.
Checking prices, I found that a 50 square foot roll of Fat Mat from Amazon.com is around $95 and it measures 80 mils. I figure that 2 rolls would cover from firewall to package tray along with doing the doors and kick panels.
I'm interested in reading opinions of what FBBO members have done. Thanks.
 
I have used Dynomat products in several builds over the years and will do so on my current Charger resto. I lined the floor from firewall to package tray, put a couple of squares on the inside door skins and did the roof. Makes a huge difference in both sound and heating/cooling. The only drawback is that once you get the car that quiet the wind noise will bug the hell out of you (o:
 
I used Rattle Trap (same folks that make Fat Mat), on my '69 Roadrunner. Did the entire floor up to the trunk, roof, inside the doors, inside of the quarters and have still some left of the 100 SQ FT I bought. Car is soon to be on the road, so I can only help out with the amount needed and not how well it works..Installation was pretty easy.


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I used the Rattle Trap also, firewall to package tray, doors, quarters, kick panels but not the roof, I've had it out a few times already and it's a big improvement in sound, have to wait to see what it dose for the heat though.

IMAG0163.jpg
 
I haven't had much of a problem with heat. It does get over 100 here in the summer, but for me it isn't a big deal.
The road noise at freeway speeds isn't terrible as is for a short drive, but once the drive goes beyond 45 minutes to an hour, it gets to be tiresome. My hope is for LESS road noise, not the complete elimination of it. I enjoy most of the old car experience.
 
I used B Logic from Summit, went on great and cost a lot less. Aluminum foil on both sides and probably 3/8-1/2" thick. Good luck
 
Not as of yet. But before, tapping on the roof 125 decibels after 65 decibels. not sure about heat deflection. goes on pretty easily with a shutz gun. The shop that did the body work on my car used it on (2) 59 chevys they did with good results, so I give it a try.
 
I ordered 2 rolls of 1ft X 50 ft of Fat Mat in the 80 mil thickness. This should be plenty to do the car.
The interior of the car was done in 2003 including the headliner. I will NOT pull the headliner down to put this stuff up there. I may need to make some sort of cardboard trunk divider to attach some of this stuff to. I may even make some sort of simple speaker box to sit under the package tray. I figure that anything I can do to isolate the trunk from the speakers will result in a cleaner sound coming from them.
 
What about the smell? if it's not butyl they say the roofing stuff smells? Does it ever go away?
 
I've heard the same about the asphalt based stuff. Some say the smell goes away, others say it remains and even returns as the seasons change to summer.
I went ahead and made the decision to use the Fat Mat stuff. I keep air fresheners in the car to reduce the old car smell anyway.
 
I used some industrial rubber mating in spots cause it was free! And keep earplugs in the glove box for long hyway runs......
 
I'm guessing the Fat Mat is pretty much identical in construction/material as the rattletrap, being it's made by the same company. If so, there is no smell coming from the rattle trap I put in.
 
Same here, Rattle trap/Fat Mat has no smell at all.
 
I have used Dynamat on all my builds, usually do the headliner, doors and floorboards...it makes a huge difference in both cooling the interior and reducing noise...not cheap but if you are going to keep the car for a while it is well worth the cost and effort
 
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