Loo's Answer: For low porosity hair, I would actually recommend using a humectant-based moisturizer after a good deep conditioning treatment. After washing your hair, rinse with hot water (not too hot), then apply a moisturizing deep conditioner. (The hot water and subsequent heat will help to lift the cuticles a bit.) Let the conditioner sit for 20 minutes with heat, then rinse with warm water. Follow up with a moisturizer containing glycerin or honey. (I recommend whipping a moisturizer of 1/2 part shea butter, 1/2 part mango butter, 1 part conditioner (I recommend V05), and 1/2 part glycerin. If this mixture does not work for you, then check out the Hibiscus & Banana Leave-In from Curl Junkie (click here). It contains even more humectants and is also geared towards fine hair.)
For porosity classifications and more tips of caring for low porosity hair, check out this article.