Start your gel manicure with the OPI Gel Stay Classic Base Coat, designed to help your gel color adhere and stay strong for up to 21 days. This high-performance base coat ensures smooth application and long-lasting wear, protecting your natural nails while enhancing your gel color. How to Use: 1. Apply a thin layer to clean, dry nails. 2. Cure under an LED lamp for the recommended time. Shop now for a smooth, strong base that lasts!