I have the middle size West pump. It dispenses about 1 oz of resin+hardner per stroke and is fine up to about a pint. For larger volumes (sometimes a gallon or two in a batch) I pour the resin into a pail and use a standard graduated paint rule. The paint rule has scales for 2:1, 3:1 and 5:1 so I can use it for other epoxies. I use the cheaper 2:1 stuff for non-structural filling and ProSet is 3:1.

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Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or lack there of) at: http://www.rutuonline.com
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"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?