Transparent. Stop nails from baking! What It Is: Diamond-strong nail hardener that shields your nails. How It Works: Our real Micro-Diamond and titanium formula instantly bonds to your nails, strengthening while virtually ending breaking, peeling and tearing. The Results: Noticeably harder, stronger nails. Salon tested. America's no. 1 nails brand. Good for 24 months once opened. sallyhansen.com. Made in USA.