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View Full Version : Calculating epoxy coverage

gazzer
08-14-2009, 07:23 PM
Epoxy has gotten quite expensive, so I don't want to mix up too much for a particular task. Too much in the glue joint makes for much extra work cleaning up, as well. Mixing up not quite enough and having to rush an extra batch is always fun (stress builds character, right? Shoulda bought the slow hardener)

So, does anyone have any wisdom about calculating how much epoxy would be necessary for a particular glue joint? It would be straight forward if one did not have to consider absorption of the epoxy into the wood. For instance - 1 cubic centimeters of epoxy would glue an area of 100 square centimeters with a intrajoint width of 0.01 centimeters (assuming no absorption).
Considering absorption, would the effective glue area only be half? or less?

Lot of variables: Wood species, temperature, viscosity of epoxy, clamping pressure, ????

I reckon that there are no perfect answers. Perhaps the strategy should be to determine coverage as I go along (means keeping records and thinking ahead), but the backup plan would be to always have something else ready that needs gluing.

All insight is appreciated.

-G

JimConlin
08-14-2009, 07:30 PM
THis has been beaten to death and the body is not yet cold.

gazzer
08-14-2009, 09:21 PM
Saw that thread, but as it related to lay up of glass or other fabric, it didn't cover my interest: gluing wood to wood. My understanding is that epoxy-wood joints don't like to be starved by either not enough glue or over clamping. Is there an optimum cured interjoint epoxy thickness to shoot for?

-G