Strengthening for Weak Nails: Protect natural nails from bending and constantly breaking Gel Base Coat Required: Builder gel needs to be apply after base coat, otherwise it will peel off very quickly Gel Top Coat Required: Builder gel will remain sticky after curing. Seal the builder gel with a top coat to prevent stickiness Cure Required: Cure under UV lamp for 60s. Cure longer if you apply a thick layer or use a low-wattage UV lamp Bigger Volume: 16ml(0.54 fl.oz) colorist series large bottles with a champagne metal design GAOY Clear Builder Gel for Nails, 16ml Nail Strengthener in a Bottle, Self-Leveling Hard Gel for Nails, Soak Off Long Lasting UV Gel