The NSI Essential Base Coat is an LED and UV curable gel base coat that provides exceptional adhesion to the natural nail. This product covalently bonds to both the natural nail and the product for exceptional adhesion. It prevents lifting, and improves the wear of gel polish and hard gel systems. This base coat is odourless, non-yellowing, and contains vitamins C & E. Cures in any Full Hand LED & UV Lamp – Eliminating Long Dry Times – Use the Dual Cure Lamp!