Repair Mode™. Wanna prevent nail damage from things like hand washing or cleaning products? Ding ding ding! Repair Mode™. This breakthrough bond building nail serum completely reprograms your nails, resulting in 99% nail keratin repair.* Nails look improved after the first application, and with continued use, you can expect smoother, stronger nails that are resistant to breakage and an improved appearance of ridges and colour. It's repair like never before.