Hi Pker1234

That sounds odd to me - I would not expect a skin unit to have two layers of different materials. I don't want to give you the wrong advice without understanding the issue in case I spoil your unit, so could you take some close-up photos of the edge of your unit, so that I can see what you mean about the two layers?

I'm sorry the GTBG didn't work. Since it isn't actual hairpiece glue, you don't have to wait. You just put a generous layer of gel (on piece or scalp) and then set the piece into position on your head, pressing it well down to squeeze out any air which is trapped under the piece. Then leave it to dry. You can help it along with a hairdryer if you like.