Sound Deadening vs. Insulation

[DRASTiK 22]

I've seen a few threads mentioning sound deadening and insulating materials. I'm trying to decide what to do with the bare floorpans and trunk in my coupe. Since the care is stripped down to a bare rolling chassis, I'm working to get the sheetmetal repaired and protected before I move on to anything else (currently I'm replacing both quarter skins). I plan to prime and paint the floor before the carpet goes in and I definitely want to apply some sort of sound deadening material (not sure what kind). Should I be concerned with insulating material as well?

What products have you been successful with and what do you recommend I stay away from?

 

I've spent some time searching other threads, but still find myself unsure about what I should do as there appear to be many different opinions. I appreciate any opinions anyone can provide. Thanks in advance.

[Slick69 10]

Everyone I've talked to in the business uses Dynamat. Not cheap, but the best. Over the winter I'll strip my interior out and go that route myself.

[DRASTiK 22]

How much should be used? One site i saw said only 10% of the area needs to be covered for road noise to be reduced. That seems a little low, but I obviously don't know what I'm talking about.

[9350 10]

I used Summit Racing's Hush mat insulation. It's a little cheaper than Dynamat. I put it on the inner firewall, front floorboards and over the mufflers in the back. I installed a/c, so I wanted to keep the heat away. It seems to work alot better than the factory insulation.

[jjstang 51]

Have you considered a product like lizardskin. It's a paint with micropheres mixed in. I believe it both insulates and sound deadens. Very expensive. Evidently you can buy he micropheres themselves and you can mixed them with any kind of paint you want. Much cheaper. I was considering mixing with an encapsulater like Por15. There would be less adheasion issuse and the thicker you put it on the more it insulates. I saw it on a neighbor's car. It certainly removed the tin sound out of then panels, etc.

[Slick69 10]

How much should be used? One site i saw said only 10% of the area needs to be covered for road noise to be reduced. That seems a little low, but I obviously don't know what I'm talking about.

 

As much as you can. All the ones I've seen have pretty much covered all the tin including beneath the rear seat. As much as you can. I also have A/C and this should also help with that.

[DRASTiK 22]

Thanks for the responses guys. I'm going to look into the hush mat and lizard skin options. I'm not in a big rush, I'm just trying to get my plans together.

[Stroked302 10]

I used a product called b quite. Did floors, truck and roof area. Worth the extra time and money if your doing a full restoration.