Difference between Moisturizing and Sealing (Oiling)

When I first started on my curly hair journey, I remember looking for products rich in oils and butters because I thought they “moisturized” dry curly hair – they really did make my hair look good but it was not moisturizing that they were doing.

Water is what moisturizes or hydrates hair. Period. Even the good old dictionary will tell you that moisture=water. Oils and butters don’t moisturize your hair. Then why are they important?

Wetting hair causes it to expand and become plump. Squish to Condish is a great way to optimally hydrate curly hair. During the drying time, this water evaporates. Oils and butters help lock or seal moisture within the hair, helping it remain hydrated longer.

But your hair needs to be really wet and not just damp. Without water before the oil, your hair is lubricated and shiny and probably greasy, not moisturized. It is like applying lotion on dry skin – you just end up with greasy skin. But if you apply lotion on skin right after a shower, your skin looks moisturized.

This is why it is very very important to make sure your hair is very wet before applying products post wash.

In short, you cannot moisturize with just water (it will evaporate) or just with oil (it will keep your hair dry).

This is applicable to the type of products you apply as well. Water based products should be followed by oil based products.

Of course using oil before your wash is for a totally different purpose and it’s explained here – Oils and curly hair – Benefits, types and ways to apply. Also penetrative oils are slightly different, especially coconut oil. It helps retain moisture from within. Science of Coconut oil on hair