A police stand-off with convicted rapist Antonio Loguancio in Melbourne's north has entered its second full day.

Loguancio has been holed up in a house in Justin Avenue in Glenroy since about 7pm on Friday.

Police say they are intent on negotiating a peaceful outcome and will take as long as they need.

They describe Loguancio as a significant risk to the community after breaching a supervision order by assaulting his partner before going into hiding.

He threatened to harm himself and others after making contact with police while on the run.