The FLEXI BUILDER gels are both strong and flexible and provide maximum strength and elasticity to all nail types. They are all LED/UV curable Gels that cure in 60 seconds in ProNails THE LIGHT and 2 minutes in UV-lamps. FLEXI BUILDER gels are applied over a ProNails base gel (Perfect Base, Clear Base or Pink Base) for maximum nail adhesion. The Flexi builder gels are ideal for students and beginning nail technicians and perfect for extensions on nail forms. FLEXI BUILDER Gels come in three different colours : CLEAR, PINK and FROSTED PINK and are transparent on the natural nail. They are applied, and cured finger by finger or four fingers and thumbs separately.