BIAB (also known as builder gel) was developed by the brand The Gel Bottle. Creative nail expert and content creator, Sadie Jordan, always uses BIAB on her clients: “It’s a [curable] gel nail enhancement designed to add strength and structure to your natural nails, helping them to grow out without breaking as easily,” says Jordan. She adds that BIAB is more viscous than gel polish. “It allows you to build an apex — the highest part of a nail enhancement, most visible from the side angle — which is what makes your nail more durable.”
