Weld-On Problems

While checking the outer layer of the leg, I noticed the Weld-On 16 is not creating a permanent bond. With just a little force I can pry the pieces apart, so I went back and reglued some spots with Krazy Glue. I checked a test piece I had glued together a few weeks ago and that came apart easily. Kind of a drag since the Weld-On was easier to work with.