The Davines OI Collection: What Every Product Does and Who It's For
If you've spent any time in professional hair care circles online, you've seen Davines OI recommended unprompted, repeatedly, and with genuine enthusiasm. It's one of those collections where the word of mouth does the marketing — clients use the oil once, then slowly build a full routine around it without really planning to.
The reason isn't mystery. It's Roucou Oil, a signature and the result it delivers: a softness, shine, and frizz control combination that most products claim and very few actually achieve.
What most people don't realise is that the OI Oil — the product that starts almost every OI story — is part of a complete collection. The shampoo, conditioner, treatment butter, All-In-One Milk, body wash, and hand balm all exist, all use the same Roucou Oil complex, and all work together as a layered routine that builds on itself.
Here's what every product in the OI collection actually does, and how our stylists think about building a routine around it.
The ingredient that defines the collection: Roucou Oil
Every product in the OI range is built around Roucou Oil — a cold-pressed oil derived from the seeds of the Bixa Orellana tree, native to the Amazon basin. It's 100 times richer in beta-carotene than carrots, which gives it powerful antioxidant properties alongside its conditioning benefits.
In hair care, Roucou Oil does something unusual: it creates a micro-thin protective lipid film on the surface of the hair shaft that reflects light, seals raised cuticle scales, and blocks the humidity that causes frizz — without accumulating the way heavier oils or silicones do. It absorbs rather than sitting on top, which is why OI products consistently feel lighter in the hair than their results suggest they should.
That's the characteristic the collection is known for: results that look expensive without the weight or greasiness that usually accompanies them.
OI Shampoo — the foundation
The OI Shampoo is the entry point to the collection as a routine rather than a standalone product. It cleanses gently while delivering the first layer of Roucou Oil nourishment — so the hair arrives at the conditioner step already beginning to benefit from the complex rather than starting from a stripped baseline.
It's suitable for all hair types, colour-safe, and gentle enough for daily use. For clients who have been using a harsher or more stripping shampoo, the change in how hair feels even before conditioner is often immediately noticeable.
Available in the Davines OI collection →
OI Conditioner — the daily maintenance step
Davines OI Conditioner — from $22 CAD
The conditioner is where the OI signature softness becomes most immediately tangible. The Roucou Oil complex delivers instant detangling, eliminates frizz, and leaves every hair type — from fine to coarse — feeling noticeably softer and more manageable after rinsing.
It's a genuinely universal conditioner in the sense that it works well across the full range of hair types without being specifically formulated for any one of them. Fine hair finds it lightweight enough that it doesn't flatten. Thick or coarse hair finds enough moisture that it actually conditions rather than just detangling. Colour-treated hair finds it colour-safe and nourishing without compromising the integrity of the colour.
The OI Conditioner is the daily maintenance step — used at every wash, 3–5 minutes, to maintain the Roucou Oil baseline between more intensive treatments. It's not the product that dramatically transforms the hair week over week; the Hair Butter does that. This is the product that keeps the progress consistent between those weekly treatments.
Available in 75 ml, 250 ml, and 1000 ml. The litre size with a Davines Litre Pump ($6.50 CAD) is the most practical option for clients who use it daily.
OI Hair Butter — the weekly treatment
Davines OI Hair Butter — from $23 CAD
If the conditioner maintains the OI baseline, the Hair Butter resets it. It's a richer, more concentrated treatment mask with a higher Roucou Oil concentration and a longer contact window — 5 to 20 minutes, used once a week in place of conditioner — that goes deeper into the hair cortex and delivers significantly more nourishment and smoothness than the daily conditioner can achieve.
The texture is silky and butter-like, melting into the hair immediately despite its richness. What comes out after rinsing is immediately different: more smoothness, more manageability, and more of the polished OI finish that persists through the full week rather than fading after a day.
Our stylists recommend it most for clients whose hair has been through colour, lightening, heat styling, or chemical services — hair that maintains well with the daily conditioner but needs something more intensive once a week to actually improve rather than hold steady. It's also excellent for naturally coarse, thick, or curly hair that needs more intensive moisture and frizz control than a standard conditioner alone provides.
Pro tip from our stylists: apply to damp (not dripping) hair and cover with a warm damp towel or shower cap for the full contact time. Heat opens the cuticle and allows the Roucou Oil to penetrate deeper — the difference between a standard rinse and a warm-towel application is noticeable in the same session. Rinse with the coolest water you can manage to seal the cuticle closed after.
Available in 75 ml ($23 CAD), 250 ml ($66 CAD), and a 1000 ml pro size ($159 CAD).
OI Oil — the one that started the word of mouth
Davines OI Oil — from $31 CAD
The OI Oil is the single most requested Davines product at Moda — and the product that introduces most clients to the collection. It's a multi-purpose finishing oil that seals the cuticle, eliminates frizz, delivers intense mirror-like shine, and provides heat protection up to 230°C — all in one application, on either damp or dry hair.
What makes it different from most hair oils is that it doesn't feel like an oil once it's in the hair. No greasiness. No heaviness. No next-morning residue. What it leaves is a smooth, sealed finish that makes hair look lit from inside — the kind of shine that reads as healthy rather than product-coated.
Two to three drops warmed between the palms and worked through damp mid-lengths before blow-drying delivers heat protection and a perfectly smooth blowout. The same amount smoothed through dry hair after styling eliminates flyaways and adds a mirror-like shine that elevates any result.
The technique detail that matters most: warm the drops between both palms for a full five seconds before touching the hair. This emulsifies the oil and allows it to spread evenly through far more hair with far fewer drops. Clients who skip this step use too much and get heaviness. Clients who warm it properly cover a full head of hair with two or three drops and get a dry, weightless finish. This is the step our stylists mention every single time someone buys OI Oil for the first time.
Available in 50 ml ($31 CAD) and 135 ml ($70 CAD).
OI All-In-One Milk — the leave-in for the full routine
The All-In-One Milk is a leave-in spray with eleven benefits in a single application: heat protection, detangling, softness, shine, frizz control, volume, nourishment, UV protection, strengthening, colour protection, and a polished finish. Applied to damp hair before styling, it's the bridge between the rinse-out steps and the blow-dry or air-dry finish.
For clients who want to simplify their pre-styling routine into one product, the All-In-One Milk is the OI answer — particularly effective for fine hair that wants all of those benefits without the weight of an oil before the dryer, and for colour-treated hair that needs UV protection built into the daily routine.
Available in the Davines OI collection →
OI Body Wash and OI Hand Balm — extending the routine beyond the hair
Davines OI Body Wash — $35 CAD
The OI Body Wash extends the Roucou Oil experience from the hair to the skin — the same signature warm amber fragrance, the same cold-pressed oil nourishment, in a gentle body cleanser that leaves skin feeling polished and soft rather than stripped after rinsing. For clients already devoted to the OI hair routine, it makes the entire shower experience cohesive: one fragrance, one philosophy, Roucou Oil from scalp to skin.
Davines OI Hand Balm — $29 CAD
The Hand Balm takes the OI experience out of the shower and into the day. The same Roucou Oil nourishment and the same signature OI fragrance in a balm that absorbs quickly and leaves hands genuinely soft without tackiness or greasiness. At Moda, it's the product clients reach for at the station after their appointment — and one of the most consistently added-to-cart alongside the oil.
How to build an OI routine
The most common OI entry point is the Oil — someone gets it recommended, tries it, loves it, and starts wondering what else the collection does. Here's how our stylists suggest building from there:
Start simple: OI Oil alone as a finishing product is already a meaningful upgrade to most routines. Nail the technique (warm the drops) before adding anything else.
Add the conditioner: once the Oil is part of the routine, OI Conditioner at every wash is the natural next step. The two together cover the finish and the daily maintenance.
Add the Hair Butter weekly: once the daily routine is established, replacing conditioner with Hair Butter once a week accelerates the progress significantly — this is when most clients notice the change is cumulative rather than wash-by-wash.
Add the All-In-One Milk for pre-styling: if you blow dry regularly, the All-In-One Milk before the dryer adds heat protection and all eleven benefits in a single spray, which replaces multiple products with one step.
Complete the routine with the Body Wash and Hand Balm if you want the full OI experience — but these are genuinely optional additions rather than part of the hair care foundation.
The collection is available individually or you can start with the OI Oil and build from there. If you're not sure where to start, ask your Moda stylist — we use these products in the chair and can tell you exactly which steps suit your hair type right now.
Shop the Full Davines OI Collection →
Shop All Davines at Moda →
Book an appointment in Bowmanville →
