HEMA & TPO-Free BIAB: The Next Evolution in Builder Gels
Builder in a Bottle — better known as BIAB — has quickly become one of the biggest trends in nail care. Loved by nail technicians and clients alike, BIAB is perfect for strengthening natural nails, creating overlays, and even sculpting short extensions.
Recently, there’s been a growing interest in HEMA-free and TPO-free BIAB formulas. But what does this mean, and why does it matter? Let’s take a closer look.
What Is BIAB?
BIAB is a type of soak-off builder gel that comes in a bottle, making it easy to apply like regular gel polish. Once cured, it provides a strong yet flexible layer over the natural nail, helping prevent breakage and supporting nail growth.
It’s popular because it gives nails a natural look and lasts longer than standard gel polish — all while being kinder to the nail plate than acrylic.
What Are HEMA and TPO?
Two ingredients you’ll often hear mentioned in nail products are HEMA and TPO.
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HEMA (Hydroxyethyl Methacrylate): A monomer that helps products like BIAB bond securely to the natural nail.
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TPO (Triphenyl Phosphate): A photo-initiator that helps gels cure properly under UV or LED lamps.
Both of these ingredients have been used in nail products for many years without causing concern for most people. Millions have enjoyed BIAB and gel manicures containing these ingredients with no problems at all.
Why Are They Being Replaced?
The beauty industry is always evolving, and in recent years there’s been more focus on allergy awareness and ingredient safety.
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HEMA can cause allergic reactions in a small number of people, particularly those with very sensitive skin or with repeated, prolonged exposure.
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TPO was added to the EU list of prohibited cosmetic ingredients in 2025, following updated research into its safety profile.
👉 Importantly, this doesn’t mean that previous BIAB formulas were “unsafe.” Instead, it reflects stricter cosmetic regulations and the industry’s commitment to cleaner beauty standards.
Benefits of HEMA & TPO-Free BIAB
Choosing a BIAB that’s free from both HEMA and TPO offers peace of mind — without compromising on performance.
✨ Key benefits include:
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Reduced risk of allergic reactions and irritation
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Fully compliant with the latest EU and UK cosmetic regulations
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Same durability, shine, and strength as traditional BIAB formulas
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Wide choice of colours and finishes, so you don’t lose out on style
Who Should Use It?
HEMA & TPO-free BIAB is a great option for:
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Clients with sensitive skin or a history of allergies
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Nail technicians who want to offer safe, inclusive services
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Anyone who wants to keep up with future-proof nail products that meet new standards
How to Use HEMA-Free BIAB
The good news? Application is exactly the same as traditional BIAB:
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Prep the natural nail (clean, shape, and buff).
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Apply a base coat and cure.
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Apply thin layers of BIAB, curing between coats.
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Finish with a top coat for strength and shine.
Removal is just as straightforward too — BIAB can be soaked off safely with acetone.
Final Thoughts
For years, ingredients like HEMA and TPO have been widely used in BIAB and gel nail products, helping them perform beautifully. Millions of people have worn them safely, so there’s no need for alarm if you’ve used these formulas in the past.
The move towards HEMA-free and TPO-free BIAB is simply the next step in nail care: aligning with updated regulations, supporting those with sensitive skin, and giving everyone the chance to enjoy beautiful, long-lasting nails with extra peace of mind.
At Belle Beauty, we’re proud to embrace this change by offering HEMA & TPO-free BIAB that are safe, strong, and stunning. ✨
👉 Explore our full collection today and discover your new go-to builder gel.
