When choosing a sealant, you want to be sure to consider your hair profile as well as your environment. Some key things to pay extra attention to are as follows: - Porosity: This is especially important if you are wanting to use an oil since different hair porosities require different oils. For example, high porosity hair requires a more penetrating oil, whereas low porosity hair requires a sealing oil. Medium porosity hair is lucky and can use a mixture of both. Low porosity hair can also opt to use a humectant like aloe vera (in certain climate conditions) if they find the oils too heavy. - Thickness and Density: These can help you determine which oil you want to use. For example, if you have fine and/or low-density hair, lighter oils will suit you better. Whereas if you have hair that is coarse and/or high-density, you will be able to benefit from heavier oils. - Humidity: If the relative humidity where you live is quite high or low, you'll want to avoid humectants in your sealant. In cases of high humidity, humectants can attract too much moisture into your strands, causing them to bloat and damage the hair. If the humidity is too low, the lack of humidity in the air will cause the humectant to draw moisture out of your strands and into the air, which can lead to dryness. Once you have compiled this information, you should be able to formulate yourself an amazing sealant that will suit your hair perfectly. If you needs some further guidance on the different oils, please refer to our Ultimate Guide to Hair Oils.