The next step is to prepare just enough FlexKrete to prep the site.  This involves mixing a known amount of FlexKrete with a measured amount of catalyst for 1 minute(refer to the bottle or the catalyst instruction page for these measurements).  To give you a better idea of how much FlexKrete you will need, priming the site involves using a natural brush to paint a layer of FlexKrete onto and around the site.  The layer should be thin, but thorough.  Make sure to get all low-lying areas as well as the area around the hole within the tape.