BIAB — Builder in a Bottle — is a gel overlay applied directly onto your natural nail to strengthen and protect it, without adding length the way extensions do. It's applied and cured like gel polish but has a thicker, more structural formula, which is what gives it its strength.

TL;DR

• BIAB is a structural gel overlay that strengthens natural nails
• Unlike acrylic or hard gel, it doesn't add length — works with your natural nail
• Lasts around 3 weeks before an infill is needed
• From £38, 45 minutes

How BIAB is different from standard gel polish

Regular gel polish is a thin colour coat designed to sit on top of the nail and last a couple of weeks. BIAB is a structural gel — thicker and more durable — designed to genuinely reinforce weak or damaged natural nails while they grow out, rather than just adding colour.

How BIAB is different from acrylic or hard gel extensions

Acrylic and hard gel extensions add length by building a false tip or form beyond your natural nail. BIAB works with your natural nail's existing length, using its structural strength to protect rather than extend. That makes it a noticeably lighter, more natural-feeling option, and generally an easier removal process than acrylic.

Who BIAB suits best

BIAB is particularly well suited to anyone with naturally weak, thin, or damaged nails who wants strength and a polished finish without extensions — as well as anyone transitioning away from acrylics who wants a gentler option while their natural nail recovers.

For current pricing and to book, see the BIAB Nails page →.

Ready to strengthen your natural nails? See pricing and book BIAB →