Cool How Long After Perm Wash Hair References. But if you can manage, you should wait 72 hours for the best results. However, unlike hair color, a perm won't wash out and can't be chemically reversed.
Don’t wash your hair too soon. Web to wash your hair after a perm you have to wait 48 hours. Professional stylists have determined this time frame to be essential for the preservation of your new curls.
