Catholics,can non catholics enter "purgatory"?

Yes of course they will. Just in case your one of those who think Purgatory is a second chance well if you do your wrong. Those who go through purgatory are being cleaned from the stains of sin. Sort of like taking a Bath. Remember nothing unclean can enter Heaven.Those who go to purgatory are guaranteed Heaven as where fore those who go to Hell have no hope and are there forever.