The Stovebolt Site Forums The Shop Area Interiors Insulation

Redoing my interior, and before I put the carpet in I wanted to put in some insulation underneath and on the firewall, mainly for noise and heat.

So I got a roll of this silver heat barrier type insulation from Home Depot for about $12. Seems perfect for this type of use. It's about a half inch thick, and easy to work with.

Anyway, how do I get it to stick to the firewall? I cut out all my peices and taped them to the firewall using duct tape. Then the next morning I noticed all the duct tape came off... so that's not gonna work. Any other ideas? The firewall is clean and freshly painted, but not quite smooth.

I've never had luck with the spray adhesives. I've tried them with headliners, and if it couldn't even get a cloth headliner to stick, I doubt it will work for this.

Thanks!

If it's the stuff I'm thinking, you are supposed to peel the paper backing off and it has adhesive on it that will hold pretty darn good.

Huh, I'll check when I get home. Thanks!

I don't think it has any adhesive on it and I don't think it will make much difference retarding heat. I would spend some more $ and get something that will make a real difference.

Check out this comparison: Sound Deadening Material

As you can see the Second Skin Damplifie rates near the top when comparing brands.
I choose the damplifie and am quite satisfied with the result. It turned a tomato can into a furry casket to use a cheap analogy. Also the price was much cheaper than the leading product.

The stuff LDO is thinking of is called Peel N Seal (other brands names in other parts of the country) & it's not 1/2" thick. It's a nail through moisture barrier. If you have the generic insulation plain old contact cement might work to hold it down. Before using that stuff I personally would go to a carpet seller and buy some really thin carpet pad & use it. That's what I used under the floor mat in my '38 and love it.
This stuff. It's not standard foam carpet pad.

When I used the material you are using, stevebolt, I used Liquid Nails with a caulking gun. That'll hold it!

Maybe I'll give that a try.

No, it isn't the kind with an adhesive backing.

The floor is no problem, it's the firewall. I want to run it all the way up the firewall and on the underside of the cowl. That's a lot of vertical space, so I need a good way to hold it up there without falling down.

Is this the best stuff to use between the headliner and roof?

I bought a couple of cans of spray adhesive when I did my interior from the auto upholstery supply shop in Denver. It worked fine. I don't recall the name but I'm sure there are several out there and I'd bet 3M makes one. Try NAPA.

It's sold as roof patching if it's the same stuff I bought at H-D. Not a heat barrier but works good as a sound deadening material. Has a peel off paper backing and about a foot wide roll?

I put it in the doors, back of cab, floor, everywhere I could get it to stick.

53moneypit, that sounds like a good idea...never thought of roof patch, but I can see that would be good sound deadener. The stuff we sold at the auto paint dept. was ridiculously expensive. Off to the Depot I go...Thanks!

I used this stuff

here is a pic

used it on the firewall also

The "peel and seal" at my local lowes was only 6 or 8 inches wide

Dad, that's much cheaper than the stuff I used to sell, and has the reflective coating. Thanks!

Its not as thick as hushmat or dynamat, but its affordable.
It may not work well for sound deadening.

it helps with the heat and the tin can thong. I used it on my doors and back of cab also.

I installed a firewall pad also ...pic...

Good Luck

I've insulated old trucks and cars since my first 51 3600 back in the mid 60's. My mother got an LTD and I was quite fascinated with the almost total silence and was determined to quiet my tin can truck. I first stuffed fiberglass under the dash which made a huge difference. Then I stuffed it under and behind the seat. I could drive down the highway and never hear those dang tappets rattling.
Since then I've used a bunch of different material and the truth is, each one did a better job than the last. The moral of my lengthy tale is, you pay for what you get. The cheapest will probably be the least effective. The most expensive will serve you the best. It has been my experience that there are 4 or 5 groups of insulation you can use and everyone must decide how much he is willing to spend. In my mind, insulation is one of the most important elements for a smooth ride. All that noise can make for a "LONG" trip.

If you Google "Sound deadening testing and comparison". You will learn a bunch about all the different choices there are for this.

I put some bed liner on the bottom of the cab to help with heat and road noise also.
...pic...

the weather is suppose to be 110 friday, might drive the bolt to work. no A/C

every little bit helps

I covered all the underneath of my sheet-metal with Herculiner bed-liner. I hope it helps.

I used the same stuff

3M spray adhesive works great for adhering headliners, carpeting, insulation, trim, etc.....

That's a fact! But make sure you etch well the metal if you want the adhesive to keep holding on in the heat.

Hi,
Try double sided mounting tape. I used it on my my '48, works good. You can buy it at any auto parts store. Keenan