BIAB (Builder In a Bottle) is a builder gel in a bottle designed to be quicker and easier to apply. It strengthens the natural nail and creates a light structure.
Its main difference from a traditional builder gel lies in the format: BIAB is applied directly with the built‑in brush, which saves time and makes application simpler.
By contrast, builder gel in a pot allows for more precise work and remains better suited to longer extensions and more technical constructions.

BIAB manicures typically last three to four weeks when properly applied and maintained . Unlike gel polish, which must be removed entirely, BIAB can be filled; the grown‑out portion is filed down and fresh product is applied .

BIAB takes longer to soak off than standard gel polish and may require more frequent maintenance because nails tend to grow quickly under the strong overlay . Removal requires patience—file down most of the product and soak off the remainder.

Yes. Apply BIAB as a structural base, cure fully, then apply your colour gel. Finish with a top coat to seal and protect; this combination provides exceptional longevity and a deep, even colour.