By Randy Zajac
It all started when I got a tech call from somebody
asking if WEST SYSTEM® 105/206 would accept a nail
pounded in, after it was cured, with no pilot hole. I
confidently said that it would not work well and in most
cases cause a fracture in the epoxy. Just for fun, Iwent out in
the shop and tried it because even though every tech advisor
agreed it wouldn't work,nobody had ever actually done
it.Well, we were right the nail caused a "brittle" failure.
Then I saw a 1/8" thick piece of cured G/flex 650 epoxy sitting
on my work bench that I had left over from another test.
Once again, just for fun, I pounded a finish nail into the surface
only to find out that it took the nail and didn't crack.
Thinking it was a fluke, I did it again with no failure. At this
point, I decided to do some tests with more controlled attention.
I cast a sample that varied in thickness up to a 1/2 inch onto a piece
of 3/4 inch plywood. The sample took 8p nails at five different
thicknesses along the sample without cracking. The sample
also took #6 drywall screws at different thicknesses with
no pilot hole. To rule out the chance of this property going
away as it
cures further, I put the samples
in an oven at 120F for the weekend. I took the samples
out and let them cool back down to room temperature.
When I tried again, all was the same as before no
Looking for the next step, I visited my uncle's furniture
reupholstering shop. All of the samples took a 7/16" staple
from an air-gun, plus #4 and #6 tacks (think square cornered
wedge) without cracking. G/flex is now used to fill frame
members on furniture that has been reupholstered so
many times that the wood is falling apart and won't hold a
Not only did these tests provide valuable data on the
toughness, flexibility, and impact resistance of G/flex Epoxy,
they gave us a great visual demonstration of what
Copyright 2002, Gougeon Brothers, Inc. All rights reserved.
Last Modified on 10/28/02.
Reproduction in any form, in whole or in part, is expressly forbidden without the consent of the publisher. EPOXYWORKS, Gougeon Brothers, WEST SYSTEM, Episize, Scarffer and Microlight as used throughout this publication, are trademarks of Gougeon Brothers, Inc., Bay City, Michigan, USA.