Strengthening Base for Classic and Like Gel Nail Polish. The Strengthening Base contains extra calcium and algae extract. Ideal for frequent use with the INOCOS Classic and Like Gel Nail Polish Range. Air dries. Details: Quantity: 11ml Usage: Apply to the nail before the Classic or Like Gel Nail Polish color. Air dry. As a treatment: Apply 1 or 2 layers, for 7-8 days, once a day. During the treatment, leave the nail natural.