The ProNails HARD BUILDER gels are very hard builder gels, some comparable to acrylics and therefore very suitable for nail extensions on forms. They are all LED/ UV curable Gels that cure in 60 seconds in ProNails THE LIGHT and 2 minutes in UVlamps. Within the HARD BUILDER gels some are harder than others. HARD BUILDER gels can be suitable as base and builder gels but are more often applied over a ProNails base gels (Perfect Base, Clear Base or Pink Base) for maximum nail adhesion. Thanks to their hardness these gels allow for thinner more natural looking gel nails. The ProNails Hard Builder gels come in different colours (CLEAR, LIGHT PINK, MILKY PINK) and different textures (TIXO PINK). They are applied and cured finger by finger or four fingers and thumbs separately.