What Is the Best Oil for Low Porosity Hair?

Updated 4 October 2026 · 7 min read

Low porosity hair has a tightly closed cuticle. That makes it resistant to damage, but it also means water and oil struggle to get in — so it feels dry, yet products sit on top and leave it greasy. The right oil, used the right way, fixes both problems.

The short answer

Low porosity hair does best with light, fast-absorbing oils: jojoba, argan, grapeseed and sweet almond. Apply a small amount to slightly damp hair and add gentle warmth — a warm towel or shower cap — so the oil absorbs instead of sitting on the surface. Heavy oils like castor and shea work only in small amounts.

What is low porosity hair?

Low porosity hair has cuticle layers that lie flat and tightly overlapped, so moisture and oil are slow to absorb. Signs include hair that takes a long time to get fully wet, takes ages to dry, and leaves product sitting on the surface. It is often shiny but prone to buildup.

The popular "float a strand in a glass of water" test is unreliable — oils and product residue affect whether hair sinks. A better test: notice how long your hair takes to get soaked in the shower and how long it takes to dry.

What are the worst oils for low porosity hair?

The hardest oils for low porosity hair are the heaviest ones: undiluted castor oil, shea and cocoa butter, raw mustard oil and thick olive oil. They coat the cuticle instead of absorbing, leaving hair stiff, greasy and dull. Used in small amounts within a lighter blend, with warmth, they can still work.

Should I use hair oil on wet or dry low porosity hair?

Use oil on slightly damp low porosity hair, not soaking wet and not bone dry. Damp hair with a little warmth has a slightly lifted cuticle, so oil absorbs better. For a pre-wash treatment, warm the oil, apply it, then cover with a shower cap for 20–30 minutes.

What not to use on low porosity hair?

Avoid heavy butters and thick oils applied in large amounts, protein-heavy treatments used too often, silicones that need harsh shampoos to remove, and layering several leave-ins at once. Skip cold application too — without warmth, oil just sits on the surface. Clarify every few weeks to remove buildup.

What makes low porosity hair grow faster?

No oil makes hair grow faster than your genetics allow — about one centimetre a month. What helps low porosity hair keep its length is preventing buildup and breakage: light oils, regular gentle cleansing, warmth when conditioning, and a healthy diet with enough iron and protein. Less breakage means visibly longer hair over time.

Is coconut oil okay for low porosity hair?

Sometimes. Coconut oil can penetrate hair, but on low porosity hair it often sits on top and leaves it stiff or crunchy. If you like it, use a small amount warmed, as a pre-wash treatment under a shower cap, then shampoo it out. Don't use it as a leave-in.

Our Follica Herbal Hair Oil contains coconut and castor oil, so it is a richer blend. On low porosity hair, use about half the usual amount, warm it first, apply it to damp hair and always wash it out the same day.

What about high porosity hair?

High porosity hair is the opposite: a raised, often damaged cuticle that absorbs moisture fast and loses it just as fast. It suits heavier sealing oils — castor, coconut, olive and blended herbal oils — applied to damp hair after conditioning to lock moisture in. Bleached, coloured and heat-styled hair is usually high porosity.

Which hair oil brand is best for low porosity hair?

Rather than a brand, look at the first three ingredients on the label. If they are light oils — jojoba, argan, grapeseed or sweet almond — the product is likely to suit low porosity hair. If castor, shea or mineral oil leads the list, use it only as a warmed, rinse-out treatment.

This guide is general hair-care information, not medical advice. For heavy shedding, bald patches or a painful scalp, see a doctor or dermatologist.

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