I bought some butyl mat from Second Skin.  On top of this, I am going
to paint their ceramic based polymer sound deadener paint called
Spectrum Firewall.  I am hoping that this will form a solid, water
proof layer which will not get water under it.  Even if it does, I
have already sprayed the entire floor with POR 15, primer and paint,
so that shouldn't be a problem.

You may want to look into their products at
http://www.secondskinaudio.com.  I hopefully will get to apply this
this weekend.  So I will let the list know how it goes.  I still have
to put the doors on before I have a real road test.

Dana
85 Westy 1.9TD
04 Beetle TDI

------------------------------

Date:    Wed, 25 Jan 2006 12:30:51 -0600
From:    Tom Salicos <Tom@SALICOS.COM>
Subject: Soundproofing and Trapping Water?

I am concerned about putting Fat Mat under the carpet since it is a =
solid barrier.  For those who have applied a solid barrier under the =
carpet, did you leave it as "removable"?  It seems trapped water would
=
tend to stay trapped. =20

Also, what did you use to stick down the carpet after the
soundproofing =
was applied?  =20

Tom Salicos

'87 Syncro Westy  EG-33