Sealing wax is not needed if the buddy tape (or Parafilm) is used over the first binding tape as it will stop most air leaking into the graft faces. Proteaceae, after grafting often have adventitious shoots developing on the stock under the tape and sometimes almost in the graft interface where they intercept nutrients that are needed elsewhere. These must be removed and with a dark sealant or wax over the graft union they cannot be seen. Sealing is sometimes needed for the scion tip if that is trimmed as some mimeteses (e.g., the silver-leafed mimetes and M. saxatilis) are vulnerable to the tip and topmost leaves drying and this seems to help a bit.