Lew,
Lurk here for a couple of years and count the number of threads that
reference just that problem. As long as there is no exposure, the problem
doesn't exist. When there is exposure, the extent of liquid migration is not
determinable. In the end, total removal and replacement of the foam is the
only certain repair and the cost can be unaffordable for large sections like
sandwich hulls.
Steve

"Lew Hodgett" wrote in message
hlink.net...

"Steve Lusardi" writes:

I have used foams for this purpose in the past and they all worked well
for
me, but the real danger is water/liquid intrusion. They all absorb to
some
degree, which makes repairs impossible. In that light, any structure
that
is
expected to maintain some element of value over time, should never be
made
using any foam. Your call, my 2 cents.

And where did that come from?

Lonza, makers of Airex, for one, probably would take exception to your
statement.


--
Lew

S/A: Challenge, The Bullet Proof Boat, (Under Construction in the
Southland)
Visit: http://home.earthlink.net/~lewhodgett for Pictures