Hard as nails. Strengthening top coat. Seals and strengthens for an extra-hard finish. How It Is: Advanced top coat that strengthens and defends your nails. How It Works: Our advanced formula provides a tough-as-nails, high-shine finish that helps prevent breaking and splitting. The Results: Stronger nails and shiny manicure that lasts. Salon tested. America's no. 1 nail brand. Good 24 months once opened. sallyhansen.com. Made in USA.