High Porosity Hair
High porosity hair has a raised or damaged cuticle with gaps: it absorbs water and products instantly but loses moisture just as fast, so it often feels dry, frizzy or thirsty. Here is how to confirm high porosity, the rich sealing routine that works, and what to avoid.
What Is High Porosity Hair?
High porosity hair has a cuticle that is raised, gapped or lifted, so moisture rushes in easily and escapes just as quickly. The result is hair that drinks up product but never seems satisfied, dries very fast, and tends toward dryness, frizz and tangling. High porosity can be genetic, but it is very often the result of damage: bleaching, coloring, heat styling, chemical relaxing and even rough handling all lift and wear away the cuticle over time. The hallmark is hair that absorbs everything instantly yet still feels dry.
How Do You Know You Have It?
Three signs point to high porosity. The float test: a clean dry strand sinks quickly, because water floods in through the open cuticle. The timing test: your hair saturates almost instantly in the shower and air dries fast. The feel test: hair drinks up products and still feels dry, especially at the ends, and is prone to frizz and tangles. A history of coloring, bleaching or heat use makes high porosity even more likely. If that pattern fits, your hair is high porosity.
How Should You Care for It?
The high porosity routine is about packing in moisture and then sealing it in. The pillars: 1. Use rich, creamy products, butters and oils that high porosity hair can actually absorb and hold; 2. Layer moisture with the LOC or LCO method, then seal with a heavier oil or butter to close the gaps; 3. Use leave-in conditioners generously, since this hair loses moisture fast; 4. Add protein or bond-building treatments periodically to help fill the gaps in a damaged cuticle; 5. Rinse with cool water to help the cuticle lie flatter; 6. Minimize new damage: lower heat, gentler coloring, and protective styles all help.
What Should You Avoid?
High porosity hair is often already damaged, so the goal is to stop adding to it. Continued high-heat styling and harsh bleaching lift the cuticle further, deepening porosity, so reduce both. Skipping sealing steps lets the moisture you add escape immediately, which is the core high porosity frustration. Over-washing strips what little moisture the hair holds. And while protein helps, too much of it on already-fragile hair can cause brittleness, so balance protein with moisture and watch how your hair responds.
Frequently Asked Questions
- How do I know if I have high porosity hair?
- High porosity hair sinks in the float test, wets and dries very fast, and absorbs product while still feeling dry. A history of coloring or heat styling makes it more likely. The free test confirms it.
- What products are best for high porosity hair?
- Rich, creamy products, butters and sealing oils. Layer moisture with the LOC or LCO method and seal it in, and add protein or bond-building treatments to help a damaged cuticle.
- What causes high porosity hair?
- It can be genetic, but it is most often caused by damage: bleaching, coloring, heat styling, chemical treatments and rough handling all raise and wear away the cuticle.
- How do I seal moisture in high porosity hair?
- Apply water-based moisture first, then lock it in with a heavier oil or butter (the LOC or LCO method), and finish with a cool-water rinse to help the cuticle lie flatter.
Not sure yet?
Confirm your porosity in 1 minute with the free test.
Take the porosity testAnd to complete your hair profile, pair this with the free hair type quiz.
The other porosity levels
- Low Porosity HairLow porosity hair has a tight, flat cuticle that repels water: it is slow to get wet, slow to dry, and products tend to sit on top rather than absorbing.
- Medium Porosity HairMedium porosity hair has a balanced cuticle that lets moisture in and holds onto it well, making it the easiest porosity to care for.
Last updated: June 2026