Friends,

There was a discusion on Dynamat and equivalents, and someone mentioned
using foam as an insulator. I like this idea, and want to get your opinion
on the following:

1. Which foam to use? I know HomeDepot carries "Great Stuff" expanding foam.
Is this good to use.

2. Should I worry about moisture build up?

3. Would this create or acceralate rust?

I was not planning on doing this to the doors due to the moving parts
relating to windows and locks, but I would like to use this in the rear
quarter panels and trunk.

Thanks as always for your ideas/comments.

In article NK_Pf.15889$Cc3.11190@trnddc08, "t" wrote:
Friends,

There was a discusion on Dynamat and equivalents, and someone mentioned
using foam as an insulator. I like this idea, and want to get your opinion
on the following:

1. Which foam to use? I know HomeDepot carries "Great Stuff" expanding foam.
Is this good to use.

2. Should I worry about moisture build up?

3. Would this create or acceralate rust?

I was not planning on doing this to the doors due to the moving parts
relating to windows and locks, but I would like to use this in the rear
quarter panels and trunk.

Thanks as always for your ideas/comments.

As a sound insulator, you need mass, and curred foam has little mass.
It might be good to stabilize panels to reduce rattles.I think the bond to the metal
will keep moisture out.

greg

Silicone is perfect for getting rid of rattles and filling in gaps. 4
bucks a tube, resists water and dries flexible. It stinks for a few
days though.

Are you looking to kill rattles or road noise? Spray foam will work
great for rattles if between two pieces, such as sheetmetal plates in
the trunk lid, doors, etc. Dynamat and such add mass to metal to quiet
vibrations, basically like putting your hand on a bell. To kill road
noise, products like dynamat or expanding foam will do very little.
Something you can try is basically what automobile manufacturers already
do, which is putting padding under the carpet, but also going the extra
step and putting it behind interior panels, above the headliner, and
basically as much as you can stuff anywhere you can stuff it. Its
basically like a heavy, thick foam padding that you can get from carpet
or home improvement stores in different thicknesses. Average price is
about 15 cents per square foot here.

Brandonb


t wrote:
Friends,

There was a discusion on Dynamat and equivalents, and someone mentioned
using foam as an insulator. I like this idea, and want to get your opinion
on the following:

1. Which foam to use? I know HomeDepot carries "Great Stuff" expanding foam.
Is this good to use.

2. Should I worry about moisture build up?

3. Would this create or acceralate rust?

I was not planning on doing this to the doors due to the moving parts
relating to windows and locks, but I would like to use this in the rear
quarter panels and trunk.

Thanks as always for your ideas/comments.

Brandon,

I love that idea. It's removeable, breathable and cheap!! I'm running out to
my home depot to pickup some foam padding.

Thanks Bro.




"Brandon Buckner" wrote in message
news:ZhdQf.15677$oL.4705@attbi_s71...
Are you looking to kill rattles or road noise? Spray foam will work great
for rattles if between two pieces, such as sheetmetal plates in the trunk
lid, doors, etc. Dynamat and such add mass to metal to quiet vibrations,
basically like putting your hand on a bell. To kill road noise, products
like dynamat or expanding foam will do very little. Something you can try
is basically what automobile manufacturers already do, which is putting
padding under the carpet, but also going the extra step and putting it
behind interior panels, above the headliner, and basically as much as you
can stuff anywhere you can stuff it. Its basically like a heavy, thick
foam padding that you can get from carpet or home improvement stores in
different thicknesses. Average price is about 15 cents per square foot
here.

Brandonb


t wrote:
Friends,

There was a discusion on Dynamat and equivalents, and someone mentioned
using foam as an insulator. I like this idea, and want to get your
opinion on the following:

1. Which foam to use? I know HomeDepot carries "Great Stuff" expanding
foam. Is this good to use.

2. Should I worry about moisture build up?

3. Would this create or acceralate rust?

I was not planning on doing this to the doors due to the moving parts
relating to windows and locks, but I would like to use this in the rear
quarter panels and trunk.

Thanks as always for your ideas/comments.

Well, be careful with that stuff because the rapid expanding foam that
swells can create alot of pressure on the inside of the metal panels and can
misshape your panels you spray into. Just be cautious of how much you use.

--
- AUSTIN BECKER
"t" wrote in message news:vQgQf.3$Lf1.2@trndny05...
Brandon,

I love that idea. It's removeable, breathable and cheap!! I'm running out
to
my home depot to pickup some foam padding.

Thanks Bro.




"Brandon Buckner" wrote in message
news:ZhdQf.15677$oL.4705@attbi_s71...
Are you looking to kill rattles or road noise? Spray foam will work
great
for rattles if between two pieces, such as sheetmetal plates in the
trunk
lid, doors, etc. Dynamat and such add mass to metal to quiet vibrations,
basically like putting your hand on a bell. To kill road noise, products
like dynamat or expanding foam will do very little. Something you can
try
is basically what automobile manufacturers already do, which is putting
padding under the carpet, but also going the extra step and putting it
behind interior panels, above the headliner, and basically as much as
you
can stuff anywhere you can stuff it. Its basically like a heavy, thick
foam padding that you can get from carpet or home improvement stores in
different thicknesses. Average price is about 15 cents per square foot
here.

Brandonb


t wrote:
Friends,

There was a discusion on Dynamat and equivalents, and someone mentioned
using foam as an insulator. I like this idea, and want to get your
opinion on the following:

1. Which foam to use? I know HomeDepot carries "Great Stuff" expanding
foam. Is this good to use.

2. Should I worry about moisture build up?

3. Would this create or acceralate rust?

I was not planning on doing this to the doors due to the moving parts
relating to windows and locks, but I would like to use this in the rear
quarter panels and trunk.

Thanks as always for your ideas/comments.

I think he's talking about the foam rubber undercarpet padding, not the
expanding foam.

Brandonb


Austin Becker wrote:
Well, be careful with that stuff because the rapid expanding foam that
swells can create alot of pressure on the inside of the metal panels and can
misshape your panels you spray into. Just be cautious of how much you use.

Austin / Brandon,

I did go over to Home depot, and picked up the felt padding instead. It's
much denser and neater to work with. The problem I have now is what should I
use for the trunk lid? I can't (actually don't want to use because of dust
and ugliness) use the felt there. I guess my only choice is dynamat, but I
don't care for the super shiny metallic look. It screams "steal me, I have a
cool car stereo system".




"Brandon Buckner" wrote in message
news:PflQf.609691$084.533294@attbi_s22...
I think he's talking about the foam rubber undercarpet padding, not the
expanding foam.

Brandonb


Austin Becker wrote:
Well, be careful with that stuff because the rapid expanding foam that
swells can create alot of pressure on the inside of the metal panels and
can
misshape your panels you spray into. Just be cautious of how much you
use.

In article DPhRf.39292$CI6.2731@trnddc07, "t" wrote:
Austin / Brandon,

I did go over to Home depot, and picked up the felt padding instead. It's
much denser and neater to work with. The problem I have now is what should I
use for the trunk lid? I can't (actually don't want to use because of dust
and ugliness) use the felt there. I guess my only choice is dynamat, but I
don't care for the super shiny metallic look. It screams "steal me, I have a
cool car stereo system".


When I checked last, The Home Depot also had thick rubber padding.
Very thick. Much mre effective than Dynamat. This stuff was on one of
those big rug rolls. The trunk will not stay open.

greg



"Brandon Buckner" wrote in message
news:PflQf.609691$084.533294@attbi_s22...
I think he's talking about the foam rubber undercarpet padding, not the
expanding foam.

Brandonb


Austin Becker wrote:
Well, be careful with that stuff because the rapid expanding foam that
swells can create alot of pressure on the inside of the metal panels and
can
misshape your panels you spray into. Just be cautious of how much you
use.

t wrote:
Austin / Brandon,

I did go over to Home depot, and picked up the felt padding instead. It's
much denser and neater to work with. The problem I have now is what should I
use for the trunk lid? I can't (actually don't want to use because of dust
and ugliness) use the felt there. I guess my only choice is dynamat, but I
don't care for the super shiny metallic look. It screams "steal me, I have a
cool car stereo system".

If someone's looking at the Dynamat on the inside of your trunk lid,
they're probably already stealing your ****. Unless you're putting the
stuff on the outside of the trunk lid, in which case you deserve to have
your car stolen.


---
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Unless you're putting the
stuff on the outside of the trunk lid,

That would be kind of a rad look for a car. Don't you think that Dynamic
Control should sponsor a car with Dynamat on the OUTSIDE? Now THAT would
get your attention.

MOSFET