When is nail hardener typically applied during a manicure?

Nail hardener is typically applied before the base coat during a manicure because it serves as a strengthening layer for the natural nails. The primary purpose of a nail hardener is to fortify the nails, making them less prone to breakage and chipping. By applying it first, it can penetrate the nail surface and create a protective barrier, ensuring that the nail is in optimal condition before any further products, such as the base coat, color polish, or top coat, are applied. This sequence is important because it allows the hardener's benefits to be fully effective and provides a solid foundation for the subsequent layers, improving the overall durability and appearance of the manicure.