Builder Gel XL is a thick, protective polish that strengthens nails by creating a stronger nail foundation. The thicker viscosity of the gel will prevent breakages and smooth nail ridges while promoting growth. It requires 1 thin layer of 2in1 Optional Base Coat & Extension Gel Adhesive before application. The gel dries with a tacky surface, allowing for various finishing options like Optional Top Coat, One Step Gel Polish, or rubbing alcohol, depending on desired results.