What is Low Porosity Hair?
If your hair takes forever to get wet in the shower, stays wet for hours after washing, or products just seem to sit on top of your hair rather than absorbing — you likely have low porosity hair. This guide will explain exactly how to care for this hair type effectively.
Understanding Hair Porosity
Hair porosity refers to how well your hair's cuticle layer allows moisture to enter and exit the hair shaft. Low porosity hair has tightly overlapping cuticle layers that resist moisture penetration, which is why products tend to build up rather than absorb.
The Float Test for Porosity
Place a clean strand of hair in a glass of water and wait 2-4 minutes. If it floats on top, you have low porosity hair. If it sinks to the middle, you have medium porosity. If it sinks to the bottom immediately, you have high porosity.
Low Porosity Hair Characteristics
- Takes a long time to become saturated with water
- Products seem to just coat the hair rather than penetrate
- Prone to product buildup
- Dries slowly after washing
- Often has a healthy-looking shine because the cuticles lie flat
How to Care for Low Porosity Hair
1. Use Heat to Open Cuticles
The biggest secret to conditioning low porosity hair is to use heat. Apply conditioner after shampooing and cover your hair with a plastic cap, then sit under a hooded dryer or use a warm towel over the cap for 15-30 minutes. The heat opens the cuticle so moisture can enter.
2. Use Lightweight, Water-Based Products
Avoid heavy butters and thick creams — these just sit on top of the tightly closed cuticle and cause buildup. Instead, choose water-based leave-in conditioners and light oils like argan, grapeseed, or jojoba oil.
3. Clarify Regularly
Because products build up easily, low porosity hair benefits greatly from a monthly clarifying shampoo session to remove buildup and reset the hair.
4. Use Humectants in Humid Climates
Ingredients like glycerin and honey are humectants that draw moisture from the air into the hair. These work brilliantly for low porosity hair in humid climates.
5. Avoid Protein Overload
Low porosity hair is prone to protein overload, which makes hair hard, brittle, and prone to breakage. Limit protein treatments to once a month maximum and focus more on moisture-based treatments.
Best Ingredients for Low Porosity Hair
Look for: glycerin, aloe vera, panthenol (vitamin B5), honey, lightweight oils (argan, jojoba, grapeseed). Avoid: heavy proteins, shea butter, thick oils.
Conclusion
Once you understand your hair's porosity, caring for it becomes much more targeted and effective. Low porosity hair simply needs warmth, lightweight products, and regular clarifying. Combine this with a solid beginner hair care routine and you'll see dramatic improvements.