Glazing Ultraseal Topcoat A technologically advanced topcoat that reinforces the therapeutic value of JESSICA's basecoats and corrective treatments. Formulated with keratin amino acids to add strength, Top Priority seals and protects the polish like a ceramic glaze, safeguarding the manicure for up to two weeks. Intelligent, informed people want more. You are selective in your use of nail care products. You want to be confident that you are getting the proper treatment for your individual nail condition. You are savvy - sometimes from experience - about the healthful or damaging effects of different products and methods.