Salon manicure. Smooth & strong base coat. Up to 90% smoother looking nails, instantly (based on consumer perception)! Fills ridges, salon strength. America"s No. 1 nail brand. No DBP, toluene, formaldehyde. Salon tested. Results guaranteed. What it is: A gel-like base coat, that smoothes ridges and imperfections for salon results at home. How it works: This biotin & spirulina enriched formula, with self-leveling action, fills ridges evenly. Hardens weak nails and adds density to thin nails to help prevent splitting. Even finish grips color. The results: Smooth, beautiful nails, salon-perfect color application. Biotin, a vitamin found in oysters, & spirulina, a marine extract, are known to help strengthen and nourish nails. Made in USA.