Best thermal and sound insulation for floor and headliner

[Charger Fan]

I'm close to installing the new carpet and headliner on my '73 Charger. I want to install good sound and thermal barriers on the floor pan and roof before installing either. There are lots of products on the market with various prices. Any recommendations on a good overall product out there that will achieve both thermal and sound barrier protection?

 

[Davefinan]

I , also , am interested in some advice on this. Just got a 76 b100 van and it’s a blank canvas right now

 

[Biopack]

I used the Kilmat product. I recommend the 80mil and it is available from Amazon.

 

[71Beeper]

Good ol Dynamat, but the stuff is stupid $$$.

 

[themechanic]

Just checked the links at the bottom.

Sound deadener/insulation recommendations

I’m looking at different products for lining under the trunk mat, under the interior carpet, and between the roof and headliner. I’m aware of Dynamat, FatMat, KILMAT, & Noico in various thicknesses. Have any of you used these products, and what are your recommendations, and tips? Would you use...

www.forbbodiesonly.com

 

[Don selleck]

I just ordered some of the el cheapo stuff for around $1.50 a sq. ft. should be here in a few days will get back if its any good for install, adhesion, etc. Bought the Dynamat before, was nice stuff, but around $7 a foot. that's a hell of a price difference. I could double it up and still cost less than half.

 

[440 4 speed]

Some people use the insulation that is used on furnace ductwork. Say they like it. Home Depot sold it at one time. It is butyl and silver, I did our car with it. Whenever I get it finished I will find out how quiet it is.

 

[eldubb440]

if it's an empty shell, lizard skin sound deadener and thermal insulation is an easy spray in

 

[j-c-c-62]

Maybe stating the obvious, in generalities, insulation solutions for thermal and acoustic issues often have opposite attributes. Best solution is to use a sperate solution for each issue based on need. Everything else singly is just a compromise to some degree. Both solutions are tasked usually with reflecting the concern, or dampening the concern, and sometimes both. There are no silver bullets. Each case is different.
Case in point, reflective surfaces reflect infrared heat well. However, having it on the inside surface of an interior primarily only efficiently reflects heat back inside the car, but it sure looks pretty. Dark/Black surfaces emit heat rather well vs light/white colors. Acoustically, mass dampens sound well, light thin materials do not. Thick stiff, solid materials reflect sound better.
The best and most overlooked solution IMO, just reduce the source of the problem first.

 

[Mackman]

I used Kilmat on the floors and in the doors of my 69 GtX. Behind the rear seat I used a repro cardboard barrier that I covered with self adhesive duct insulation from Lowe’s. Made a huge difference in sound reduction. I’m very happy with the results.

 

[Paul_G]

I used a product like this in my 73 Muscle Rat. Inside stays cool even at 110° in direct sun. Used it on the floors and roof.
https://www.amazon.com/Car-Heat-Sou...8-2-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9hdGY&th=1

The 72 Pro Touring SSP I am doing right now is getting Lizard Skin. Heat and sound. Probably still use the foam on package shelf and cardboard trunk divider.

 

[71Beeper]

I agree, with the expensive price of the Dynamat, I used the furnace ductwork insulation for the rest of the interior on my Runner.

 

[Coelacanth]

I agree, with the expensive price of the Dynamat, I used the furnace ductwork insulation for the rest of the interior on my Runner.
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I like this idea, does it have adhesive backing? Was it a challenge to press-fit it in place?

 

[icetech]

I like this idea, does it have adhesive backing? Was it a challenge to press-fit it in place?

the whole backside is adhesive, it's basically beutyl (can't spell it.. the tar that holds windows in) you can cut it with a utility knife, peel the back and press in... i got both killmat and i think the other was siliss (on amazon) it's all pretty much the same.. don't overpay for dynamat

 

[71Beeper]

I like this idea, does it have adhesive backing? Was it a challenge to press-fit it in place?

No, the furnace ductwork insulation has to be glued in place.
I used this.

Spray both the insulation piece and the area you are sticking it to.
Wait a couple of minutes then apply.

I use a roller wheel to shape it as shown.

 

[440 4 speed]

The butyl/foil rolls I purchased were self adhesive. I used the weight/roller from our Weber bbq to press the material.

 

[Archie Duiker]

I'm close to installing the new carpet and headliner on my '73 Charger. I want to install good sound and thermal barriers on the floor pan and roof before installing either. There are lots of products on the market with various prices. Any recommendations on a good overall product out there that will achieve both thermal and sound barrier protection?

I first installed a layer of Nudura self stick butyl waterproofing membrane, and then added the Siless 157 mil reflective membrane from Amazon over that. This made a noticeable difference in both sound and heat transfer through the floor.

 

[funnykarman]

I used Kilmat on my 65 AFX Coronet, got it from Amazon along with a set of 3 rollers to form it to the floor, cut with a pair of scissors want down easy using the rollers also from Amazon. I covered all the tubs and back package tray, would have had more pics but camera took a dump.

 

[gkent]

I recommend the 80mm and it is available from Amazon.

LOL ... Americans and the metric system !!!

 

[SimoHoss]

I purchased 2 boxes of Siles 120 mil. Just as good as the high priced name brands and thicker. It is a

Car Sound Deadening mat - Butyl Automotive Sound Deadener - Noise Insulation and Vibration Dampening Material​

https://www.amazon.com/dp/B09Y5BQYGL?ref=ppx_yo2ov_dt_b_fed_asin_title