Bio SculptureŽ Sculpting Gel is a Flexible Gel that offers the unique feature to sculpt strong, durable but flexible gel extensions. It has the color of the natural free edge (grey) to create natural looking gel extensions (apply only on the free edge). Used as a first layer under opaque color overlays for long or weak natural nails. It has to be stirred with a Metal Spatula before use and cures for two minutes under a 9-watt UV-A Lamp. Finish with a color or French overlay.