BIAB is an acronym for builder in a bottle ... create extensions or directly on the natural nail,” according to The GelBottle, which is credited as the original builder gel manufacturer.

BIAB (pronounced bee-abb) stands for “builder in a bottle” – it's a specially formulated soft-gel, that's specific to British gel nail polish brand, The Gel Bottle. What to Read Next ‘BIAB ...

So, I decided it was finally time to try BIAB (aka, Builder in a Bottle). You've probably heard talk of BIAB, given how steadily it has grown in popularity over the last few years. But like me ...