It improves the acrylic mass and gel adherence by etching the nail plate. Very efficient. It is recommended in case of any problems connected with air locking and adherence. The improved non-acid formula protects the cuticles and the nail plate. When it dries, it leaves a sticky coat that improves the adherence of the material applied later (gel, acrylic). The UV gel should be put on the nail plate only after the Primer is dry. In the case of highly moisturized natural nail plate, the procedure should be repeated several times packaging with the brush: 15 ml.