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Old 10-01-2009, 03:03 PM   #1 (permalink)
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Looking for a good sound dampener/insulation under headliner

My car is stripped right now and I was wondering what a good, inexpensive insulator for under the headliner would be. Someone suggested undercoating and another person suggested spray in bedliner. I want something that won't cost a fortune, will last and will do a decent job. If anyone has pics of the method they used I would really appreciate it. This is not a show car, but I am trying to do the best I can with what I have.
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Old 10-01-2009, 03:22 PM   #2 (permalink)
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Re: Looking for a good sound dampener/insulation under headliner

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My car is stripped right now and I was wondering what a good, inexpensive insulator for under the headliner would be. Someone suggested undercoating and another person suggested spray in bedliner. I want something that won't cost a fortune, will last and will do a decent job. If anyone has pics of the method they used I would really appreciate it. This is not a show car, but I am trying to do the best I can with what I have.
Hey Domino,
Ms. American has a new Headliner just waiting for installation.

When the old Headliner was removed there was an insulation material that was like "Rockwool" glued to the underside of the roof. It had decayed, and was a MESS to remove.

Not sure that undercoating or bed liner would provide much "insulation".

Have been contemplating the use of "CelloTex", which is a styrofoam that comes in various thicknesses, and has a layer of aluminum foil on each side.

It's light, strong, and could be cut in strips of the right length to be put in cross-wise on the under side of the roof without removing the Headliner Bows. It wouldn't even need to be adhered as if the length were just right, it would fit with a slight bow to it to hold it tight against the underside of the sheet metal. Also, it's not very expensive. a 4'-0" X 8'-0" sheet of the stuff is less than $15.00.

It's easy to work with. Is cut with a utility knife, is clean, impervious to moisture, mold, heat and cold, and is a GREAT insulator, as that's what it's made to do.

Probably isn't proper & correct, but what the heck, no one sees it anyway, and it'd work better than the Rockwool stuff that was originally used because it doesn't decay or turn to dust.

Whaddaya think?

JC
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Old 10-01-2009, 03:44 PM   #3 (permalink)
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Re: Looking for a good sound dampener/insulation under headliner

My car had that same nasty, tattered insulation underneath. It was nasty to remove and it holds moisture. I am unfamiliar with CelloTex. It sounds like it would do what I need. I tend to overdo all of my projects, so I would definitely use an adhesive. Where can one obtain this product? My car will never be proper or correct, but it is perfect for me.
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Old 10-01-2009, 03:55 PM   #4 (permalink)
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Re: Looking for a good sound dampener/insulation under headliner

I used Dynamat Extreeme in the roof of my last Starliner and I have been very impressed with the results. Prior to the installation if you raped on the roof with a finger it would sound like a large metal drum now it sounds like rapping on a piece of 1/2" plate.

But the thing that has impressed me the most is that with my head being so close to the roof when I am driving (6' 2 1/2") it would get very warm in this Texas summer heat and now even with a black car you can not feel any heat getting through to the inside.

It is expensive but it does work very well.
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Old 10-01-2009, 06:22 PM   #5 (permalink)
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Re: Looking for a good sound dampener/insulation under headliner

JC-I went to Home Depot and saw some insulation like you mentioned. It has not been ruled out.
One37tudor-Dynamat would be nice, but I won't know how much I can afford until I get an estimate on headliner installation.
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Old 10-01-2009, 06:37 PM   #6 (permalink)
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Re: Looking for a good sound dampener/insulation under headliner

The headliner in those cars is not so bad to install but the rear window does have to come out to do it so that adds to the cost of the job. It will also need a new window rubber seal but other than that it is not too bad to do.

Scott...
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Old 10-01-2009, 06:53 PM   #7 (permalink)
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Re: Looking for a good sound dampener/insulation under headliner

The windshield and back glass are already out. New rubber is sitting in a box waiting for paint to be finished. I decided to pay someone because I know I will screw it up. I completely lack patience when it comes to upholstery. I can dig through wiring harnesses all day and never tire, but this frustrates me. There is an older gentleman that is near my car that will put it in at a very reasonable price. I can put the glass back in.
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The car is named Albert(Big Al, not Big Gal!)
1986 Mustang Notchback. Regatta blue! (My daily driver)
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Old 10-01-2009, 08:38 PM   #8 (permalink)
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Re: Looking for a good sound dampener/insulation under headliner

When I did my last Starliner I searched the web for a good price on the Dynamat and found bulk box kits for about $135 for 9 pieces. One box is plenty to do the roof. That has been two years ago so I don't know what it is today? I do know that what ever they used for the sticky side is some very good stuff, After it is in place for several days and gets hot once or twice it is not coming back off.

The Starliner I am currently working will likely be sprayed with a ceramic coating of some type. I plan to do the entire inside with it.

Scott...
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Old 10-01-2009, 08:44 PM   #9 (permalink)
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Re: Looking for a good sound dampener/insulation under headliner

Just did mine with FAT MAT. Bought it on ebay 100 square feet for 135 shipped.
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Old 10-01-2009, 08:45 PM   #10 (permalink)
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Re: Looking for a good sound dampener/insulation under headliner

A friend of mine is looking into Lizardskin. It is supposed to be very good. Summit sells it it comes in a 2 gallon bucket.
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The car is named Albert(Big Al, not Big Gal!)
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Old 10-02-2009, 03:09 AM   #11 (permalink)
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Re: Looking for a good sound dampener/insulation under headliner

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Originally Posted by Domino View Post
My car had that same nasty, tattered insulation underneath. It was nasty to remove and it holds moisture. I am unfamiliar with CelloTex. It sounds like it would do what I need. I tend to overdo all of my projects, so I would definitely use an adhesive. Where can one obtain this product? My car will never be proper or correct, but it is perfect for me.
Hey Domino,
It is a building supply material. It can be had here at the local lumber yard, and probably Lowe's or Home Depot, though I've never gotten it from those places.

It comes in 3/8", 1/2", 5/8", and 3/4" thicknesses, each having a higher insulation rating. It can probably even be had in 1" thickness.

It is used in home construction in place of the fiberglass, between studs insulation.

Here it is called: CelloTex, but that could be a brand name. Ask for the styrofoam stuff with the aluminum foil on either side. The people at the lumber yard will know what you want.

The more thought that has been had about it, the more certain it is that THAT'S what is going to be used on Ms. American.

JC
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Old 10-02-2009, 03:44 AM   #12 (permalink)
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Re: Looking for a good sound dampener/insulation under headliner

two things -

first- keep the bows in order as you take them out -they are location sensitive-- trust me o this--

second -the bows sit really close to the roof-- using a thick insulation will cause prob when you put the bows back in with the head liner-

dynamat seems to be good stuff--
not very thick and deadens the sound and vibration of the steel
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Old 10-02-2009, 03:47 AM   #13 (permalink)
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Re: Looking for a good sound dampener/insulation under headliner

also -when you put sound deadner in -it does not have to cover every square inch-- it can be cut in strips and blocks and placed on the inside of flat panels--
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Old 10-02-2009, 03:56 AM   #14 (permalink)
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Re: Looking for a good sound dampener/insulation under headliner

EZ Cool Automotive Insulation heat barrier and noise reduction for cars, trucks, classic cars, street rods and much more

Anyone Use Lobucrod's Heat & Noise Insulation? - THE H.A.M.B.

L
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Old 10-02-2009, 08:18 AM   #15 (permalink)
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Re: Looking for a good sound dampener/insulation under headliner

Rich27028 is correct about both the bows are location specific and to fact that the bows touch the roof. So remember that anything very thick will distort the bows somewhat. Even with the thin Dynamat the bows are tight up against it but because it has the smooth aluminium coating on it, it actually helps the bows move some to find their best location. However before you cut the insulation into strips think about what you are attempting to accomplish with the insulation? You can cut down on noise by using strips of insulation. This works very well in doors and quarter panel areas. If however you are also looking to insulate against the heat cutting it into strips will not give you the best results

I have used the Lobucrod's Heat & noise insulation and it is a very good product especially for flat floor panels. Unless they have changed the product in the past 2 years his material requires you to spray the 3M adhesive contact cement spray to both the back side of the material and to the area where it will be placed. While this can, and does work very well for floors I have had problems getting good contact in doors where spraying the cement is much harder to get right and I do not have much confidence that the glue will retain its hold on a roof panel over the long run? I have not used it in a roof installation so I have nothing to base that on but my gut feeling?

Also if you look at the cost of the insulation material and then add the cost of the 3M glue and the extra time and effort to get the glue installed and then cleaned up afterward and to me the ease of the Dynamat comes out on top.

Scott...
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