An excellent base coat makes for an extraordinary manicure. Boncher Base Coat helps extend the wear of nail lacquer and acts as a barrier to prevent polish from staining the nails. Used alone, Boncher Base Coat helps to protect the natural nail plate from the elements. Toluene and formaldehyde free. As a basecoat, apply one coat of Boncher Base Coat. For a natural-looking layer of protection, apply two coats.