Sealing is a method used to lock moisture into the hair. Water evaporates leaving the hair dry and brittle which increases the chances of it breaking. Moisture in the hair shaft leaves it soft and supple and less susceptible to damage.
The first step in sealing is to add moisture in the form of water or a water based product to the hair, these are products that are soluble in water. The true form of moisture is water not oil. Many of us grew up believing that we moisturized our hair with oils and greases and water was the enemy, not true. Now that the hair is moisturized we want to keep it in there as long as possible so we seal. We seal by coating the hair shaft with an oil or butter. I like to use oils particularly coconut oil in the winter and grapeseed oil in the warmer months. The oil is insoluble in water and creates a barrier that the water molecules can’t pass through essentially locking the moisture in the hair, and allowing it to dissipate at a slower rate.
Sealing is an important step to retaining length and the prevention of breakage. And is especially important during the harsh winter months where cold dry environment can suck our tresses dry. So as always…