NOTE: Skin test before using, stop using if allergy occurs, avoid eyes and mouth contact. QUICK APPLICATION: Builder gel for nails design with a clear, high self-leveling formula and built-in brush, you can easily spread the french XCOATTIPS surface and edge, then cure it under UV lamp for 45-60 seconds to fully dry. The last step is to apply top coat then cure. 30+DAYS LONG-LASTING: btartboxnails builder gel Specially developed for XCOATTIPS, which can provide ultra-protection for french tips, extend french XCOATTIPS longevity for 30+ days, and prevent peeling, chipping, fade, cracking, and lifting. PACKAGE INCLUDE: Only include builder gel 15 ml for protect your french XCOATTIPS, needs to be used with top coat, please purchase top coat separately.