A Gel Polish Ingredient Gets Banned in the UK on 15 August — Here's What It Actually Means for You

If you do gels — wearing them or applying them — you've probably seen "TPO" appearing everywhere in the last few weeks, usually attached to either a scary headline about fertility or a supplier's sale on "TPO-free" stock. Both framings have an agenda. The actual situation is more boring and more useful to know, so here it is plainly: what's banned, exactly when, and what it changes for you.

What TPO is

TPO (trimethylbenzoyl diphenylphosphine oxide) is a photoinitiator — the ingredient in some gel products that reacts to UV/LED light and triggers the curing process. It's the match that lights the fire, essentially, and it also helps colour stay stable. It's been a workhorse ingredient in gel systems for years.

The dates that actually matter

This is where most coverage gets muddled, because there are two deadlines and they do different things. For England, Scotland and Wales:

• 15 August 2026 — manufacturers can no longer place new products containing TPO on the market. This is the date in the headlines.
• 14 February 2027 — the off-shelf deadline. Distributors can't sell TPO products after this, so nail techs can't buy them.
• After 14 February 2027 — techs in Great Britain can still use TPO products they already own. This is the crucial difference from the EU, where professional use itself is prohibited.

Northern Ireland is different: it follows EU cosmetics rules, so TPO products haven't been legally purchasable there since 1 September 2025. If you're in NI, this isn't news — it's been your reality for nearly a year.

Why it's being banned (the honest version)

TPO was reclassified under chemicals legislation as a CMR substance — a category covering things flagged as potentially carcinogenic, mutagenic or toxic to reproduction. Under UK and EU cosmetics rules, a CMR classification triggers a near-automatic ban in cosmetics, regardless of the specific use case.

What that does not mean: that anyone got ill from a gel manicure. There was no incident. The concern comes from animal studies at exposure levels far above what's in a nail product, and industry bodies including BABTAC have described the ban as precautionary while further research is done. Dermatologists quoted in the coverage have consistently said the link between occasional consumer use and human harm hasn't been demonstrated.

That's not a reason to shrug at regulation — precaution is how cosmetic safety is supposed to work. It's a reason not to panic about the gels you've been wearing.

If you're a client

Your existing manicure is fine. Nothing needs removing, and there's no recall. If you have gel polish at home from a starter kit, you can legally use up what you already own — retailers just won't be able to sell you more TPO-containing kits.

Will your gels look or last different once salons switch? Based on the EU, where the change happened a year ago: no. Reformulated TPO-free products (using alternatives like TPO-L or BAPO) reportedly perform essentially the same — same shine, same wear time, same cure time. Several major brands including The GelBottle went TPO-free in the EU and are rolling the same formulas out here; others like HONA never used it.

One genuinely reasonable question to ask at your next appointment: "have you switched to TPO-free yet?" Not as a challenge — most techs are mid-transition and perfectly compliant either way — but because it's a decent signal of how closely someone follows the regulations that govern their own kit.

If you're a nail tech

The practical checklist:

• Audit your kit now. Check ingredient lists for trimethylbenzoyl diphenylphosphine oxide, or ask your suppliers directly which of your lines still contain it. Several suppliers have added "TPO-free" filters to their sites.
• You don't have to bin anything. In Great Britain you can keep using stock you already own past February 2027. The restriction is on selling, not using.
• Don't panic-buy either. Stocking up heavily on TPO products to "beat the deadline" leaves you with a shelf of product you'll eventually want to replace anyway — and clients increasingly asking about it.
• Be ready for the question. When this hits mainstream press in August, clients will ask. A calm, accurate answer — precautionary reclassification, not a safety incident, here's what I use — is worth more to your reputation than any Instagram post.
• Insurance and compliance: if you're unsure whether a product is compliant, your supplier and your professional body (BABTAC, or your insurer) are the right places to ask — not a Facebook group.

The bottom line

15 August 2026 stops new TPO products entering the GB market; 14 February 2027 stops you buying them; nothing stops you using what you already have. It's a precautionary chemical reclassification, not a discovery that gel manicures are dangerous, and the replacement formulas already work the same in the EU. Check your kit, answer clients honestly, and ignore both the fertility headlines and the "buy now before the ban" emails — they're selling different things, but they're both selling.

Curious what nail treatments actually cost across the UK? Check our Beauty Price Index, or compare gel against the alternatives in our guide to BIAB vs gel vs acrylic vs dip powder.