It sounds like you're making a problem for yourself.

At least for System Three (the only one I'm really familiar with), the
measuring error tolerance is about 10% excess hardener and 20% excess resin.
Thus, it is better to err on the side of too much resin rather than too much
hardener, This tolerance combined with a 2:1 volume ratio make the purchase
of expensive metering equipment unnecessary. (Quote from "The Epoxy Book.")

Marked containers or weighing systems will give quite adequate accuracy.

For really small amounts, mix a larger amount and throw away the excess --
cheaper than a fancy piece of equipment that requires space and maintenance.

Roger

http://home.earthlink.net/~derbyrm

"Jim Conlin" wrote in message
...
Measuring epoxy is a pain. The mustard pumps are fine if you need 1 to 8
oz. (30 ml. to 200 ml.), but if you need a quart, they're a PITA.
Weighing is hard to do with the level of repeatable precision that i'd
like. There's no practical and reliable way to precisely measure a small
(5ml.) batch.
There are also commercial epoxy measuring pumps, the "Sticky Stuff
Dispenser" and "Goo Grinder" from These folks which look like a good start,
but seem overpriced to me. I'm envisioning perhaps a pair of gear pumps,
geared tpogether at 5:1 or whatever. They could be operated by a hand crank
or spun with something powered.

So, my question is this- Who can recommend a positive displacement rotary
pump that is inexpensive and will tolerate the nasty chemicals of epoxy,
hardeners and solvents?