On 2 Apr 2006 23:35:02 -0700, "
wrote:

my impression was ballons and flox bring only physical contributions to
the mix....and therefore substituting balloons with flox would fill AND
strengthen a joint, but do no harm. In all my composites training, the
only no-no I heard was to use merely balloons when flox was called for,
and I'm sure you knew that already.

Not really, I have no experience with flox at all. But it's properties
seem to be that it's stronger than microballoons. I would suspect it's
also heavy, so has a weight penalty compared to micro. I'm going to
bond some epoxy made wing fillets to the fuselage of my Glasair 3. And
would like to mix in some flox. But in this case, I'll be bonding with
AeroPoxy, and use the flox to thicken it. But since I'll have some
flox left over, I'm going to see how it mixes with vinyl ester for
later use.
Ted