Unsuccessful experience with JB Waterweld

[ggsteve]

I have used JB Waterweld several times to attach frags to liverock. I used it again 3 days ago on a little Duncan frag, mounting it to a piece of live rock at about a 45 degree angle. Yesterday I noticed that the frag had changed angle, and then it actually fell out of the "weld". I then cleaned the JB Weld off of the live rock and it had not really hardened. The tube of JB Waterweld has been open for about a month but the cap is always on. Could it have somehow gone bad? What gives?

[cloak]

You probably didn't knead it well enough. If you don't do this correctly, it won't "activate" so to say and turn hard.

[E Rosewater]

I've come to prefer super glue to epoxy personally.

[donkeys4hire]

I've come to prefer super glue to epoxy personally.

I agree. Dollar tree has 3 little tubes of super glue gel for $1.

[Sn8kbyt]

Yep super glue works great every time.

Skimmer will/may go crazy for a day but that is minor.

[D0GFISH]

Super glue is definitely my drug of choice but sometimes you need the 'filler' like the waterweld. I've also had a hard time using some of the alternatives. So I started forming the epoxy around the frag but not expecting a permanent bond. One or two days later I check the fit. If it doesn't hold I use the superglue between the frag and epoxy. This works for me 100% of the time