Clean & Clear Essentials Deep Cleansing Oil Free Astringent, 8 fl oz. is formulated with 2% salicylic acid acne medicine to target existing pimples and help prevent new ones from forming by thoroughly cleaning pores. Deep Cleaning Astringent contains a maximum-strength acne-fighting medication that treats and helps prevent pimples. If used twice in a day, it will give good results. When applied, it does sting a little due to the alcohol content in it I guess. The toner helps to clean the face well and treats acne effectively. Astringents are water-based skin care products that are used after washing to remove leftover makeup and cleanser. The chief difference between an astringent and a cleanser is that astringents are also formulated to remove excess oil from the skin. You can think of astringent as a stronger form of a toner.