The sell-out OPI nail serum fixing gel-damaged nails is back - fans say their 'nails are the strongest they've ever been' and it's finally on sale

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OPI has a solution to two of the most common nail concerns: messy manicures and brittle nails. And you can solve both dilemmas with a rare 20 per cent off. 

The nail serum that is reforming biters and gel addicts' talons, and keeps selling out, is now back in stock and reduced to under £24 with the discount code TREAT20

OPI Repair Mode™ Bond Building Nail Serum 

OPI's Repair Mode™ Bond Building Nail Serum is a first-of-its-kind product with Patented Ulti-Plex Technology™ that penetrates the nail surface, for repair that starts from within.

Hailed by beauty lovers as a 'wonder' product with many claiming their 'nails are the strongest they've ever been', the fast-drying, easy-to-apply formula promises to deliver significantly stronger, shinier and healthier nails in just six days with regular use.

You can use the code TREAT20 for 20 per cent off until March 31 2026. 

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The OPI Repair Mode is a bond building nail serum that helps to improve keratin repair after six days of use, leaving them looking stronger and healthier

The OPI Repair Mode is a bond building nail serum that helps to improve keratin repair after six days of use, leaving them looking stronger and healthier 

The first-ever bond-building nail serum, the OPI Repair Mode™ Bond Building Nail Serum has been credited with reprogramming your nails, resulting in 99 per cent nail keratin repair. And for when your nails are ready for painting? Enter the RaiDry collection. 

The OPI Repair Mode™ is here to reverse some of the damage caused by years of gel manicures, nervous biting and picking.

You might have heard of bond-building shampoos and conditioners, but OPI has taken the same technology to help build new bonds from within the nails for smoother, stronger talons. 

If your nails snag and chip easily, then it's the perfect time to follow in scores of shoppers' nail journeys and follow their recommendation of the OPI Repair Mode. And now with 20 per cent off until March 31 with the code TREAT20, it's a savvy investment in your nail health. 

Brittle nailed shoppers are recommending the nail serum time and time again, so much so in fact that the serum has twice sold out, with one sold every six minutes.

We all know that gels and acrylics aren't the best for your natural nails, and with harmful chemicals like TPO expected to be banned in the UK in 2027, 2026 could signal your journey towards your healthiest nails and natural growth.

A great starting point, ticking boxes for ease of use and affordability, is the OPI Repair Mode. Now on sale for 20 per cent off with the code TREAT20

Going further than bog-standard nail strengtheners, the twice-daily serum helps to repair nail keratin structure by penetrating the surface to build new bonds inside the natural nail. When used twice a day on bare nails for six days, there is a proven 99 per cent nail keratin repair, resulting in smoother, stronger nails.

Thanks to the patented Ulti-Plex Technology™ that penetrates the nail surface to build new bonds from within, you can expect a 99 per cent nail keratin repair when used twice a day

Thanks to the patented Ulti-Plex Technology™ that penetrates the nail surface to build new bonds from within, you can expect a 99 per cent nail keratin repair when used twice a day 

With zero dry time, the Repair Mode is an undeniably quick step that could well be the most efficient and effective hack for repairing thin, brittle nails.

And once the serum has worked its magic, helping nails look smoother and stronger, you can go in with the brand's RapiDry polishes

Touted as a hack to smudge-proof, quick-drying manicures, these polishes are sure to be your go-to for spring nails when you need a fresh at-home mani. 

The science behind the rapid manicure is thanks to the 200 extra bristles and a wide fanning brush that gives you faster product pickup, spreading, and drying. Better still? Not only is it a great time saver, but when applying two coats, this vegan formula lasts for up to five days.

Don't forget, you can invest and save for less with the code TREAT20 for 20 per cent off until March 31 2026. 

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