It's just cyanoarcrylate like an other hard bond which is just super glue or crazy glue. It's a hard bond. I have used cyanoarcrylate on my lace pieces before and at first I loved it because you get a nice tight dry no sticky bond that is waterproof. But it builds up on the lace and you have to soak it in acetone for about 30 minutes or more to get it off and that kills the lace and hair after a while. Also if you get hairline lift you can't press it back down becuase it's not tacky at all. You have to get home and sort it out with acetone and more glue. It gives an EPIC hold though! Like rip your scalp off kind of hold, which I loved!