What Order to Apply Hair Products

Two rules explain the whole sequence

Thinnest to thickest. A light product cannot get through a heavy one. Apply a watery leave-in over an oil and it sits on the surface and runs off.

Water before oil. Oils and butters are sealants — they hold in whatever is underneath them. Put oil on a dry strand and you have sealed the dryness in. Put it over a damp, conditioned strand and you have locked moisture in for hours. This single rule is behind most of the disappointment people have with hair oil.

The full sequence

1. Pre-shampoo treatment (optional, weekly) — bond treatments and pre-wash oils. Only the products whose label says pre-shampoo; most treatments do not.
2. Shampoo — at the scalp, not down the lengths. The runoff cleans the rest. This is the AAD's own guidance and it is the easiest technique change to make (AAD, everyday hair care).
3. Conditioner or mask — ears down, never the roots. Comb through with a wide-tooth comb while it is in. Rinse thoroughly.
4. Leave-in conditioner — on damp hair, immediately, before it starts to dry. This is the moisture step everything else builds on.
5. Curl cream or styling cream — over the leave-in, still damp. Adds definition and a little more moisture.
6. Gel or mousse — last of the wet products. Forms the film that holds the shape while hair dries.
7. Oil or serum — a few drops, ends only. On damp hair to seal, or on dry hair afterwards purely for shine and flyaways.

Almost nobody uses all seven. A realistic routine is shampoo, conditioner, leave-in, and one styling product — and that is a good routine.

LOC, LCO and whether the acronym matters

You will see LOC (liquid, oil, cream) and LCO (liquid, cream, oil) recommended for curly and coily hair. Both start with water or a water-based leave-in, and then differ on whether the oil or the cream goes second.

The honest version: LCO suits most people, because it finishes with the oil and therefore seals everything underneath, which is the point. LOC suits very high-porosity hair that needs the oil close to the strand to stop moisture escaping before the cream goes on. Try one for a fortnight, then the other. The difference is real but small, and it is much less important than whether you are using a leave-in at all.

The four mistakes worth fixing

Oil before moisture. The big one. You have sealed a dry strand and it will feel worse tomorrow than it did yesterday.

Styling on dry hair. Curl creams and gels are formulated to be applied to soaking or damp hair. On dry hair they give you crunch and flakes rather than definition.

Conditioner at the roots. Grease you applied yourself. Ears down. If your roots are greasy by day two, this is the first thing to check — the oily hair shortlist covers the rest.

Too many products at once. Six products in one routine is a recipe for buildup and for never knowing which one is causing a problem. Add one at a time and give it two weeks.

One thing that matters more than order

Speed. Leave-ins, creams and gels should go on while hair is still genuinely damp, which in practice means within a few minutes of getting out of the shower. Hair that has air-dried for twenty minutes first has already lost the water you were about to seal in. Getting that right does more than perfecting the order of the middle steps.

We have not used these products ourselves. They are chosen from what is in the formula, what those ingredients are documented to do, and whether that matches the problem this page is about — and every product below links to the manufacturer's own page so you can check the formulation claims yourself. The full method is here.