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| Moisturizers | Emulsion Based Moisturizers
Oil and water do not destroy each other. When they are mixed together and shaken they form a good mixture of oil droplets in water or vice versa, depending on used proportions.
Such mixture can be stabilized with so-called emulsifiers, which are surfactants preventing water and oil droplets from coalescing. Both water-in-oil and oil-in-water emulsions may be useful for dry skin that produces a very little sebum that often happens with women after and during menopause.
Moisturizers based on oil-in-water emulsions tend to be heavier but may be a good fit for some cases of particularly dry skin. Oil-water emulsion is more comedogenic than oil-free moisturizers and should not be used for normal or oily skin.
Occlusive Moisturizers
 The idea of an occlusive moisturizer is to cover the skin with a water-proof pellicle through which water cannot escape.
Occlusive ingredients contain mineral oil, vaseline, siloxanes such as cyclomethicone and dimethicone.
These ingredients may block up pores' function and have another unwanted effect. Siloxanes may cause dermatitis but individuals have different reactions on such ingredients. Occlusive moisturizers should be used for dry skin that is not respondent to moisturizers based on oil-water emulsions.
This may happen in case when dryness caused by excessive water evaporation from the skin surface. In such a case the best alternative for dry skin is using occlusive moisturizer. It is best to apply an occlusive moisturizer over wet skin.
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