Dynamat Sound Deadening alternatives??

[BRENT in 10-uh-C]

Often times we get requests to install a sound deadening material (Dynamat) and foil insulation behind the upholstery to help with combatting noise and heat. The costs to install Dynamat is beyond expensive these days. Can anyone recommend a product they have used that they feel is equal to or better than the 18"x32" sheets that Dynamat sells?

[Hitman]

What part is expensive, the materials or labor to install them? The sheets/material cost seems reasonable to me.

[noboD]

I insolated my garage with a product just like this. It was a bubble wrap with foil meant to be used in chicken houses where the humidity is high. It was cheap and made in America. Sorry I don't remember a name. Maybe check with a pole barn installer?

[Bill's Auto Works]

Brent,

I have been using "FatMat" on the last 3 cars I did. I buy it off of ebay & feel it is just as good as Dynamat without paying for the name.

God Bless & Merry Christmas
Bill
https://www.jalopyjournal.com/forum/...closed.614419/

[LeonardS]

Originally Posted by BRENT in 10-uh-C

Often times we get requests to install a sound deadening material (Dynamat) and foil insulation behind the upholstery to help with combatting noise and heat. The costs to install Dynamat is beyond expensive these days. Can anyone recommend a product they have used that they feel is equal to or better than the 18"x32" sheets that Dynamat sells?

B-Quiet.com

They sell top quality sound deadening and heat reducing materials. Check them out. No, I have no affiliation to them other than I bought both material types to help with noise and heat in the cab of my John Deere mower.

[corvette8n]

Sponsored Links (Register now to hide all advertisements)

Originally Posted by Bill's Auto Works

Brent,

I have been using "FatMat" on the last 3 cars I did. I buy it off of ebay & feel it is just as good as Dynamat without paying for the name.

God Bless & Merry Christmas
Bill
https://www.jalopyjournal.com/forum/...closed.614419/

Looks like in comes in a couple of thickness, 50 mil and 80 mil, which do you use.?

[32Ford13]

I've got this stuff in a few cars including my '31 truck. It is top shelf for sure:
https://www.designengineering.com/
Great for heat and sound.
If you want to call them, ask for Mike, you'll get personal service and a TON of knowledge.

[ModelA29]

Originally Posted by noboD

I insolated my garage with a product just like this. It was a bubble wrap with foil meant to be used in chicken houses where the humidity is high. It was cheap and made in America. Sorry I don't remember a name. Maybe check with a pole barn installer?

My car had that under the floor mat. Useless once all the bubbles popped. Maybe OK if glued into a door.
Try these - you can figure out the sq in cost since they are different sizes.


https://www.homedepot.com/pep/39-4-i...CABEgKFRvD_BwE


https://www.summitracing.com/parts/r...iABEgK6cPD_BwE

[Oldbluoval]

What about 3M body Schultz or equivalent? I’ve used it before quick and reasonable.
Downside is if you want it gone. It’s basically a hardening undercoat

[Bill's Auto Works]

Originally Posted by corvette8n

Looks like in comes in a couple of thickness, 50 mil and 80 mil, which do you use.?

I use the 50 mil, I figure because I always use Jute/Insulation before the carpet it would be plenty. It makes the interior quieter & more comfortable. I have done 3 cars with it & in the near future will be doing three more.

I have also used it around trans lines, fuel lines & starter harnesses that are close to exhaust manifolds/headers.

God Bless
Bill
https://www.jalopyjournal.com/forum/...closed.614419/

[Wick]

I go to lowes and buy the roll of air duct insulation. It's self adhesive with a silver backing.
I've used it on about 10 Model As and my VW DC.
It's ez to work with and it works.

[Bob Bidonde]

Noise & Heat Reduction.pdfThis is the sound damping and thermal insulation I put into my Victoria.

[Bob Bidonde]

Here is the article I wrote for the above Post 12.

[30Tudor]

Great article Bob.

I have been investigating this for my '30 Tudor.

Courtesy of Google AI, sound deadening (soundproofing) effectiveness is primarily determined by four key factors: mass/density, decoupling, absorption, and sealing air gaps. I googled "What are the factors that affect sound deadening" and the answer seems consistent with my knowledge in this area.

Regarding the mass factor, I have found plenty of cheaper 80mil Butyl sound deadening products on Amazon that are probably good enough for a Model A. The heavier Butyl rubber products would work for the inside of the vehicle doors and panels and other products would probably work well for the floors (waterproof, closed cell foam with heat reflective backing).

Above my muffler I have already installed 1/8" Aluminum sheets underneath the floor boards to reflect that heat.

[Bruce of MN]

Originally Posted by Wick

I go to lowes and buy the roll of air duct insulation. It's self adhesive with a silver backing.
I've used it on about 10 Model As and my VW DC.
It's ez to work with and it works.

I can't find that type on the Lowe's website. Can you post the SKU number or more info?

[CarlG]

I've used a combination of Dynamat and Roadkill. Roadkill seems to work just as well and is less expensive than Dynamat.

[Bill's Auto Works]

This thread actually reminded me that I needed to reorder some! This is what I use.

https://www.ebay.com/itm/225832559507

Will be doing the 67 Marlin probably next week & then the 67 Toro as time permits.

God Bless
Bill
https://www.jalopyjournal.com/forum/...closed.614419/

[Phil Brown]

Originally Posted by Bill's Auto Works

This thread actually reminded me that I needed to reorder some! This is what I use.

https://www.ebay.com/itm/225832559507

Will be doing the 67 Marlin probably next week & then the 67 Toro as time permits.

God Bless
Bill
https://www.jalopyjournal.com/forum/...closed.614419/

Thank you for the link 👍

[Ayers1]

Originally Posted by noboD

I insolated my garage with a product just like this. It was a bubble wrap with foil meant to be used in chicken houses where the humidity is high. It was cheap and made in America. Sorry I don't remember a name. Maybe check with a pole barn installer?

You can get rolls of this at Lowe's or Home Depot. I glued it in the side panels of my Tudor without a lot of fuss. I also insulated the interior of a 51 DeSoto with it. Black car with a huge top. It definitely made it cooler inside afterwards!

[Wick]

Lowe's stk 28929 made by Frost King
Duct insulation $27.00