What it is: A basecoat that hides and smooths tiny ridges and imperfections in the nail giving a wonderful result to the look of your lacquer. What it does: This silk-finish, stain-resistant basecoat provides the perfect foundation on which to paint butter LONDON™ nail lacquer. The non-toxic formula has a matte effect that’s so beautiful, you can also wear it alone. What else you need to know: Butter LONDON is a new-era design house, creating extraordinary moments in color by living on the inside edge of fashion. Butter LONDON does not add formaldehyde, toluene, or DBP to any of its nail formulas. It's color without compromise. For brilliant results, use butter LONDON lacquers with the corresponding butter LONDON base and topcoats. When used together, the products last significantly longer than a typical manicure.