HEMA-Free vs TPO-Free Gel Polish: What the Labels Actually Mean
By the LunaNail Atelier · Updated
Short answer: HEMA-free means a gel polish is made without hydroxyethyl methacrylate, a small acrylate monomer linked to allergic reactions in some people. TPO-free means it is made without trimethylbenzoyl diphenylphosphine oxide, a photoinitiator the European Union banned from cosmetics on September 1, 2025. A gel that carries both labels avoids the two ingredients that are most discussed in gel nail safety today.
What is HEMA in gel polish?
HEMA (2-hydroxyethyl methacrylate) is a monomer used in many gels because it helps the formula grip the nail and cure into a hard, glossy film. Its molecules are very small, which is also why it is the acrylate most often associated with contact allergy. Sensitivity usually builds over time and is most likely when uncured gel touches the skin around the nail, which is common with at-home application.
Once someone becomes sensitized to acrylates, the reaction can carry over to other acrylate products, so dermatologists generally advise keeping uncured gel off the skin and choosing formulas without the smallest, most reactive monomers.
What is TPO, and why did Europe ban it?
TPO is a photoinitiator: the ingredient that reacts to the light of a UV or LED lamp and starts the curing process. In 2025 the EU classified TPO as a substance that may damage fertility (CMR category 1B), and under EU cosmetics law such substances cannot be used in cosmetic products. From September 1, 2025, gel products containing TPO could no longer be sold or used in salons in the EU.
The United States has not adopted the same ban, so TPO is still found in many gel polishes sold in the US. A TPO-free label tells you a brand already meets the European standard.
HEMA-free vs TPO-free at a glance
| HEMA | TPO | |
|---|---|---|
| What it does | Monomer that helps adhesion and film formation | Photoinitiator that starts curing under the lamp |
| Main concern | Contact allergy and acrylate sensitization | Classified as a reproductive toxicant (CMR 1B) in the EU |
| Regulation | Allowed for professional use in the EU with warnings | Banned in EU cosmetics since September 1, 2025 |
| Label to look for | "HEMA-free" | "TPO-free" |
Does HEMA-free mean you cannot react to a gel?
No. HEMA-free lowers exposure to one of the most common sensitizers, but every gel is still an acrylate-based product. The best protection is good technique: thin coats, no gel on the skin or cuticles, a full cure under a compatible lamp, and stopping use if irritation occurs.
How to choose a cleaner gel polish
- Look for both HEMA-free and TPO-free on the label or product page.
- Check that the brand lists the full ingredient list (INCI).
- Choose a no-wipe top coat so you are not handling a sticky, uncured layer.
- Prefer soak-off formulas that remove with acetone instead of heavy filing.
- Vegan and cruelty-free labels are a plus if they matter to you.
The LunaNail approach
Every LunaNail Gel Couleur shade and our No-Wipe Gel Top Coat are HEMA-free, TPO-free, vegan and cruelty-free. They are designed in Germany, made in Europe and cure under UV or LED lamps. Browse all 37 colors in the shade guide.
Frequently asked questions
Is TPO banned in the United States?
No. As of 2026, TPO is banned in cosmetics in the EU but not in the US, so check labels when you shop.
Is HEMA-free gel polish less long-lasting?
Not necessarily. Wear depends mostly on prep, thin coats, a gel base coat and a proper cure. Used as a system with base and top coat, HEMA-free gel can give long-lasting, chip-resistant wear.
Can I use a TPO-free gel with any lamp?
LunaNail gels cure under UV or LED nail lamps. Follow the cure times on the packaging and keep the hand flat under the light.