Which product is generally used as a base for gel nails?

A gel base coat is specifically formulated to create a strong foundation for gel nail applications. It acts as the bonding agent that adheres the gel polish to the natural nail, ensuring that the gel polish stays intact for a longer period without lifting or chipping. This base coat is designed to cure under UV or LED light, which is essential for the gel formula to harden effectively.

Using a gel base coat is crucial because it prepares the nail surface and enhances the durability of the gel nails, making them more resilient against everyday wear. Other products listed, such as nail polish, acrylic liquid, and top coat, serve entirely different purposes and are not suitable as a base for gel nails; they do not offer the same adherence properties and curing characteristics essential for gel nail longevity.