I use two layers of Kydex. Take the top layer and wire brush the back. Put both layers on the product ,wire brush piece on top, heat and form. Let cool. Take the top layer and add cement to it and your liner.first piece is for the thickness of the liner. I use Deer Skin or pig skin. Works for me. Take the other kydex sheat and reheat it till it turns flat so you can reused it. Remember, the longer you let the cement cure the stronger it will be. Makes a nice quiet holster. Hope this helps. Dennis