OPI Repair Mode is one of the newest nail treatments on Australian shelves, and it arrives with big numbers on the box. If your nails are peeling, splitting or still recovering from gels, you may be wondering whether it is the answer, or whether a keratin-based treatment like Dr Tom is the better choice. As a doctor and scientist, I have tried to compare the two fairly: how each works, what the evidence says, what is in the bottle, and who each one suits.
The key differences at a glance
| Feature | Dr Tom Nail Strength Combo | OPI Repair Mode |
|---|---|---|
| Type | Nail cream plus intensive care liquid | Bond-building nail serum |
| Key ingredient | Hydrolysed keratin from New Zealand sheep's wool | Maleic acid and 1,6-hexanediamine ("Ulti-Plex Technology") |
| Base | Water-based | Alcohol is the first listed ingredient |
| How you use it | Once a day, ongoing | Twice a day for 6 days, on bare nails |
| Testing | Independent lab tests by Lincoln Agritech on lab-made keratin nails, plus consumer testing | Patent describes tests on slices of cow hoof soaked for 24 hours; testing behind the headline claims not published |
| Money-back promise | Yes, if no benefit after consistent use | Not stated |
| Price in Australia | A$79 (cream 30 ml, liquid 4.7 ml, glass file) | About A$40 for 9 ml (RRP; often discounted) |
| Where to buy | Online, dispatched from Sydney | Online beauty retailers and salons |
How each product works
OPI Repair Mode: borrowing an idea from hair care
OPI describes Repair Mode as "the first-ever bond-building nail serum", using its patented Ulti-Plex Technology, which it says "penetrates the nail to build new bonds from within". The idea is familiar from bond-building hair treatments: small molecules are meant to link damaged protein chains back together. The ingredient list is short: denatured alcohol, water, maleic acid and 1,6-hexanediamine. It is plausible chemistry, but even in hair care, where bond builders have been used for about a decade, independent published evidence that they rebuild bonds is limited, and we could not find any independent published studies on nails.
Dr Tom: putting keratin back into the nail
Nails are made mostly of keratin, a tough structural protein. Dr Tom's cream and liquid use hydrolysed keratin from New Zealand sheep's wool, broken into fragments small enough to absorb into the nail plate. Rather than coating the nail, the aim is to strengthen the existing nail from within: the fragments bind to the nail’s own keratin and help it hold water, so it stays strong but flexible. I developed it after my own nails, which I need for playing classical guitar, kept peeling and breaking.
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What the evidence says
Both brands quote impressive figures, so it is worth asking how each was measured.
OPI Repair Mode claims "99% nail keratin repair", "94% protection of keratin protein from damage" and "4x stronger nails in 6 days", each marked only "when used as directed". OPI does not say how these were tested.
The patents behind Ulti-Plex Technology (owned by OPI's parent company, Wella) do include some laboratory testing. It was done on slices of cow hoof, soaked in the solution for 24 hours, then washed, dried and tested for bending strength. The treated slices were significantly stronger than untreated ones. That is useful chemistry, but it is a long way from brushing a thin layer onto your own nails twice a day. The "4x stronger", "99%" and "94%" figures do not appear in the patents, and we could not find any published testing on human nails behind them.
Dr Tom was tested on lab-made nails, made from keratin from sheep's wool, by Lincoln Agritech in New Zealand. We commissioned the work, but the testing and reporting were done independently by their scientists. Lab nails treated with the combination of cream and liquid were 78% stronger after two weeks, measured by tensile testing, and the cream alone made them 30% stronger in 10 days. The nails were treated much as you would at home. The cream was rubbed in by hand for 20 to 30 seconds. For the combination, the nails were first dipped in the liquid for about 30 seconds, twice, with drying in between, similar to brushing it on. Treatments were repeated 10 times over 14 days, and the nails were washed and oven-dried between treatments to mimic everyday wear. In consumer testing, 95% of people using the cream, and 100% using the combination, reported stronger, healthier nails. You can read how both were done on our lab testing and consumer testing pages.
Whatever you buy, it is worth asking the same questions of any nail product. Our guide to telling whether a nail product is legit sets them out.
What is in the bottle
OPI Repair Mode is vegan and "9-free" (no formaldehyde, toluene, DBP and six other ingredients often avoided in nail products). Its first ingredient is denatured alcohol, which lets it dry almost instantly. That is convenient, although some people with already dry, brittle nails prefer to avoid alcohol-based products.
Dr Tom's formulas are water-based, with no harsh solvents, no formaldehyde, toluene or DBP, and biodegradable ingredients. The keratin comes from wool, so the products are not vegan.
How you use them
OPI Repair Mode is designed as a short, intensive course: one layer twice a day on bare nails for six days. It has zero dry time, so it is easy to fit in.
Dr Tom is designed for steady daily care. You brush the intensive care liquid onto your nails once a day, then massage the cream into your nails. It works on the nail you already have, so the benefit builds over days and weeks, not months.
Price and where to buy
OPI Repair Mode has a recommended retail price of about A$40 for 9 ml, and is often discounted at online beauty retailers.
The Dr Tom Nail Strength Combo is A$79 and includes the 30 ml cream, the 4.7 ml intensive care liquid and a glass file. The cream is also sold on its own (A$49), and so is the liquid (A$69). Orders are dispatched from Sydney. Each Combo lasts most people about three months.
Pros and cons
OPI Repair Mode
- Pros: well-known brand, quick twice daily six-day routine, zero dry time, vegan, lower upfront price.
- Cons: alcohol-based; published testing is on cow hoof soaked for 24 hours rather than on nails; testing behind its headline claims not published; no money-back promise stated.
Dr Tom
- Pros: keratin-based and water-based, independently lab-tested, created by a doctor, money-back promise if it does not help after consistent use.
- Cons: only sold online, an ongoing daily routine rather than a six-day course, higher upfront price, not vegan.
Which should you choose?
OPI Repair Mode may suit you if you want a quick, low-cost course to try, you prefer a vegan product, or you like buying from a familiar brand.
Dr Tom may suit you if your nails have been weak, peeling or splitting for a while, for example after gels or acrylics or with the changes of menopause; you prefer a water-based, alcohol-free product; and you want independent testing you can read about and a money-back promise if it does not work for you.
If you are comparing other options too, our comparison with OPI Nail Envy looks at OPI's best-known strengthener.
Frequently asked questions
Is OPI Repair Mode the same as OPI Nail Envy?
No. Nail Envy is a strengthening polish that coats the nail. Repair Mode is a clear serum applied to bare nails as a six-day course.
Can I use OPI Repair Mode and Dr Tom together?
We have not tested the two together, so we cannot say how they interact. If you want to try both, finish one course before starting the other, so you can tell which is helping.
How quickly will I see a difference with Dr Tom?
Most people notice their nails feel stronger within a few weeks. In the lab tests, the cream made nails 30% stronger after use on 8 of 10 days, and the combination made them 78% stronger after 10 treatments over 14 days.
Is Dr Tom available in Australia?
Yes. Australian orders are dispatched from Sydney, and prices are in Australian dollars.
What if it doesn't work for me?
The Combo comes with our performance promise: if you don't see a benefit after consistent use, you get your money back.
The bottom line
OPI Repair Mode is a quick, convenient, alcohol-based serum from a big brand, with striking claims whose testing has not been published. Dr Tom takes a keratin-based approach, with independent lab testing you can read about and a money-back promise. If your nails need lasting help rather than a quick boost, the Dr Tom Nail Strength Combo is designed for exactly that.
This article is general information only and is not a substitute for individual medical advice. OPI product details were taken from OPI's website, retailer listings and OPI's published patents (US 11,628,148; US 11,890,262; EP 3651855) in October 2026, and may change.