The website mentions that the stuff is made from 'mineral-filled asphalt.'

I went to FLoBuSS (Friendly Local Building Supply Store) and saw several
comparable products.  One was a roll of aluminum-backed self-adhesive
asphalt about 6'' wide in a 25' roll (about $12).  This is flexible roof or
gutter patching.  Another was an aluminum impregnated roof coating, also
asphalt based and silver in color (about $8 for a gallon).  The last one was
a glass-fiber impregnated roof coating which is asphalt-based and sounds
like this sound deadener stuff but you paint it on from a gallon can (don't
remember the price).

I used the roll of aluminum-backed asphalt under my dash to insulate from
the outside cold/heat.  This helped to quell some of the annoying tin-can
sound you hear when you knock on the outside metal just below the
windshield.  It should also help in the summer to keep the front of the
cabin a little cooler.  I plan to add this to the footwell area as well to
shield from the radiator heat.

I may try the paint-on product and test it on assorted sheet-metal for
noise-absorbing qualities before applying in my Westy.

Chris.

'85 Westy.

>There is a sale at www.partsexpress.com (part sex press?) electronics that
has
>some stick on noise reduction sheet "stuff" for $9.95 for a 29" x 32"
sheet.
>Installed 6 of these sheets last summer and it made a HUGE difference in
noise.
>Self adhesive, cut in to form fitting pieces and stick on. Only thing you
will
>need to do - if you sound deaden the rear hatch with a full sheet or more
of
>this material you will need heavy duty rear hatch struts as the added
weight
>will cause regular struts to compress. Why spend a million dollars
>for "audiophile" carp when this stuff is so cheap you can layer it two
sheets
>deep?
>http://www.partsexpress.com/pe/showdetl.cfm?&DID=7&Product_ID=7082&CATID=35
>and
>http://www.partsexpress.com/pe/showprod.cfm?
>&DID=7&CATID=35&ObjectGroup_ID=37&OBS=10&Move=Next&Pcount=27&CurrentPage=1