1.The latest formula,Can be used as Builder Gel & Base Coat & Sheer Color Gel & Nail Reinforce Lacquer. , 2.FZANEST builder base is thicker than regular base coat.,is perfect for problem, thin and brittle nails. It will smooth out dents or unevenness on nail surface,Let you have the perfect foundation of your nail.Because Builder Base is thicker than regular base coat. Extra thickness allows you to protect your natural nails and reinforces your natural nail. Usage: