Hi everyone. ok i tried some of this epoxy. I picked it up from J&L. Its a tube of green with a white center. You ply it in your hands it turns white you put it on your frag rock you hold it on your bigger live rock for about 5 minites and then later it JUST LIFTS OFF

. I'm probably doing something wrong. Has anyone used this stuff. If so your input appreciated. The product is called Holdfast by MarineLand.
Thanks in advance
George