The foundation for everything.
 
A flexible rubber base designed to grip the natural nail, smooth out imperfections, and create the perfect base for builder application. Self-levelling, easy to control, and built for long-lasting adhesion without bulk.
 
Works seamlessly under every Flexi Build shade — because it was made to.
 
HEMA-free rubber base gel designed for maximum adhesion and flexibility. Ideal for natural nail prep, overlays, and as a base for builder gel systems. Self-levelling formula for smooth, even application with long-lasting wear.