The nail clinic in a bottle! Helps prevent chipping, splitting, cracking. What it is: The original strengthening treatment to help your nails grow longer and stronger. How it Works: Our unique blend of Film-formers seals nail edges for long-lasting protection against chipping, splitting and cracking. The Results: Stronger nails with a clear finish and shine. Salon tested. sallyhansen.com. America's No. 1 nail brand. Made in USA.