The outer side is a 'lead look' matt type finish, the other side is the hi tack, sticky side. It is a thin layer of butyl flashtex that has the consistency of very sticky putty and once it touches a surface, it is 'on'. Once pressed in place, it is not designed to be lifted and moved, so care should be taken where placing it and only remove the thin cover film when you are finally ready to fix in place.