MelodySusie 7 in 1 BUILDER THICKENING NAIL GEL: Designed with an innovative formula, it's perfect for seven amazing uses including as a thickening overlay, building apex, extending length, shaping nails, attaching false nail tips/gems/jewels and as a base gel. CURIED with UV LED NAIL LAMP: This is UV gel. It needs to be cured under a UV/LED lamp for 90-120s. Long-lasting for 28+ days with proper application.(NOTE: It is normal for builder nail gel to remain a little sticky after curing, which will make a better adhesion between nails and gel layers. It is recommended to use a top coat to seal it). QUICK & EASY APPLICATION: In 3 easy steps can enhance beautiful ails： brush on, level, and cure.