"Paul Oman" wrote in message
...

wow! they are expensive at that site and they don't even tell you the
specific gravity of the microspheres (yes, microspheres come in
different sizes). Let the buyer beware!

paul oman
progressive epoxy polymers

Actually for any usable quantity their advertized price is far better than
yours. You only list a quart of some unknown manufacture for $3. A quart
is not going to go very far when refairing a deck. Fiberglass Supply sell
a pound which is a a little more than a gallon of 3M K-15 microballoons for
$10.58.

As far as specific gravity goes, yours is the only site that touts it. OK,
so yours is .5. That is more than a bit on the heavy side. 3M Scotchlite
bubbles comes in specific gravities from .125 to .6. Fiberglass Supply
sells K-15 which has a specific gravity of .15 which makes a much lighter
putty. The crush strength of the bare balloons is 300 PSI which is plenty
for deck repair when mixed in a resin putty. For a rundown on the 3M
Scotchlite product line see: (you may have to cut and paste the
link)http://products3.3m.com/catalog/us/e...dustry/paint_c
oatings/node_SQ4MWCTNSLge/root_GST1T4S9TCgv/vroot_Q0SJ3LJK63ge/theme_us_pain
tcoatings_3_0/command_AbcPageHandler/output_html

As for me I will stick with the brands that I know like 3M and Q-cell
depending on the application and buy in quantities that make sense. After
all microballoons don't go bad on the shelf as long as you keep them dry and
bake out pretty well if they do.

Fiberglass Supply always has the best prices for less than full roll fabric
but the best selection and prices I have found for fillers is usable
quantities are from Fiberglass Coatings Inc.
http://www.fgci.com/cgi-bin/dpsmart/...typ e_0207_01

--
Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com