BIAB - HEMA & TPO-Free Builder in a Bottle

BIAB - strength and structure, as easy as a polish

BIAB (Builder in a Bottle) is a brush-on builder gel that reinforces the natural nail while applying as easily as a gel polish. It's the most beginner-friendly way to add strength, protect weak or peeling nails, and grow out length. Every Belle Beauty BIAB shade is HEMA-free and TPO-free, and correctly applied, a BIAB overlay lasts two to three weeks.

What is BIAB?

BIAB stands for "Builder in a Bottle" a soak-off builder gel thicker than standard gel polish. Where gel polish only adds colour, BIAB adds a flexible layer of structure that supports the natural nail, making it ideal for reinforcing thin or damaged nails and encouraging length.

Shop BIAB

• Individual BIAB shades above, all HEMA-free and TPO-free.
  
  
• New to BIAB? The BIAB Kit with UV/LED Lamp includes everything to start, lamp included.
  
  
• Already have a lamp? The BIAB Essentials Kit covers the shades, prep and tools.

Is BIAB safe?

Yes, used correctly. Belle Beauty BIAB is HEMA-free (the nail industry's most common allergen) and TPO-free (banned in EU cosmetics since September 2025). Remove by soaking with acetone rather than peeling, and the natural nail stays healthy.

BIAB FAQs

What is BIAB?
BIAB (Builder in a Bottle) is a brush-on builder gel that adds strength and structure to the natural nail while applying like a polish. Ideal for weak, thin or peeling nails.

How long does BIAB last?
Two to three weeks with proper prep, and it can be infilled to extend wear.

Is BIAB better than gel polish?
For strength, yes — BIAB is thicker and structural, where gel polish mainly adds colour. For plain colour on healthy nails, gel polish is fine.

Is BIAB HEMA and TPO free?
Yes. Every Belle Beauty BIAB shade is HEMA-free and TPO-free, compliant with the EU's September 2025 TPO ban.

Does BIAB damage your nails?
Not when removed correctly. Soak off with acetone rather than peeling.