Series - 2 way glue are glue pens from ZIG Kuretake . Available in three different tip sizes. What characterizes this glue is that it is a so-called dual-function glue. In other words, there are two functions when you can choose to make a permanent gluing or a temporary adhesion.
If you want a permanent bond, you attach what you want to be glued together directly, then the glue is blue. If you want the function a la Post-it notes to be able to pull it off again, you wait for the glue to become transparent, then attach.