You will enjoyrr gel nail extensionsr gel polishr r gel is a special mixture that is applied either on top of an artificial nail extension or directly onto the natural nail bed to strengthen the nail and promote natural growth the gel is usually applied in very fine layers with the nail technician 39curing39 or 39sealing39 the gel with a uv light between each layer so that the finished result is hard but still flexible with a natural looking glossy finish which is both instant