Date:         Fri, 14 Jun 2002 09:01:34 -0400
Reply-To:     Arthur Sauerhaft <kivka@EARTHLINK.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Arthur Sauerhaft <kivka@EARTHLINK.NET>
Subject:      Re: [FIX] Sound deadening with B-Quiet products?
Comments: To: Willolyn99@AOL.COM
Content-Type: text/plain; charset="iso-8859-1"

Has anyone filled body panels or other parts with expanding foam? What were
your results? Is there any substantial risk of moisture damage?
thanks,
-Arthur
'82 Vanagon Diesel (the Beast)
A BioDiesel project
Happily puttering along with a 1.9NA
----- Original Message -----
From: "Bill Marshall" <Willolyn99@AOL.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Friday, June 14, 2002 8:18 AM
Subject: Re: [FIX] Sound deadening with B-Quiet products?


>        I think the basis for the pro sound dampeners, like B-quiet, is not
> that they are asphalt.  It's because they have other mineral particles
mixed
> in with the asphalt.  Apparently, as I have read, the asphalt and the
> particles are of different densities, so they vibrate at different rates.
> This internal friction dissipates the energy of the vibration, so the
> vibration stops.
>        For those who have had success with roofing materials, the
different
> densities of metal and asphalt probably gave you some results.  I'll bet
that
> with the pro products you would find a higher degree of damping, maybe
less
> than you might notice.  I have often wondered if you mixed asphalt and
sand,
> and applied that, if it would do the same thing as the pro stuff.  Either
> way, adding mass or more rigidity to the metal should help in some way.
> Personally, I would love to fill up all panels with expanding foam and
have a
> rock-solid quiet ride.
>
> Bill Marshall
> 85 GL Tiico
> Bradenton FL