This video shows the first 3 steps to put a piece back together. I am using a rice based paste and not flour as I usually do. I also bind the piece at the top and bottom to get as good compression as possible.
Steps 1, 2, 3, refer to this page https://www.kintugi.com/?page_id=80

For more on traditional, lacquer based kintsugi, see kintugi.com