WHAT IT IS A UV-cured base coat featuring UV3 technology designed specifically for use with the Shellac UV Color Coat System. WHAT IT DOES Provides a superior adhesion layer to nails. Provides the first step of the Shellac system, anchoring Shellac Color Coat to the nail. WHY YOU NEED IT Provides a revolutionary new colour service for nails. Provides 14-day wear. SHELLAC® UV BASE COAT