The Sally Hansen Double Duty Strengthening Base and Top Coat is formulated to act as a versatile product for your manicure needs. It functions as a protective base coat to prep the nail surface and a high-shine top coat to seal and extend the wear of your polish. This dual-action formula helps to reinforce weak or brittle nails while providing a quick-drying finish. Use it under color polish for enhanced adhesion or alone for natural nail strengthening and a glossy look.