A wax stamp, for sealing your own Taskmaster tasks.

This stamp has wider letters, with a 10 degree draft angle, to make it release from the wax easier.

Use sealing wax (from a craft store like Spotlight). I used wax that could be melted in a standard hot glue gun. once it was hot enough, I squirted out a circle of wax about the size of the stamp, then let the wax cool slightly before stamping (so that it wasn't super hot and runny). I left the stamp in position for 10 or more seconds, and made sure the wax had started hardening before I pulled off the stamp.