Gelavish 'Build-it' is a low odor, self-leveling soak-off Builder Gel. If the natural nail is perceived weak for any reason, we recommend 'Build-it' be used in place of 'Dual-it' (Base). 'Build-it' was formulated to reinforce and protect weak or brittle nails providing a strong , level, ultra adhesive, and durable foundation for Gelavish Gel Polish to bond to.