Turning Archive 2005

Subject:
Epoxy comparison *LINK*

Andy in Raleigh
>I mentioned having seen what I thought was a pretty objective comparison of epoxies and I got an email asking for a URL. I am posting it below. Note that this primarily discusses the use of epoxy for fiberglassing and/or as a coating. As an adhesive you will be hard pressed to find any epoxy (except maybe some 5 minute varieties) that isn't overkill for wood (much stronger than the joint). There is a good paper on using epoxy as an adhesive for wood at:

http://www.z-clad.com/pdf_files/Bondingwithepoxywood.pdf

One tidbit from that paper:
"Glue strength is assessed by measuring the lap shear strength in appropriately designed joints. For cured epoxy adhesive mixes it is generally between 1500 - 2200 psi (120 - 150 kg/cm2) depending on the epoxy system employed."

Right above that is a chart with a few woods' strengths listed. Teak has the highest listed at 1480 with spruce and cedar about half that.

© 1998 - 2017 by Ellis Walentine. All rights reserved.
No parts of this web site may be reproduced in any form or by
any means without the written permission of the publisher.

WOODCENTRAL, P.O. BOX 493, SPRINGTOWN, PA 18081