Cover stick with Salicylic Acid for oily & blemish-prone skin. Eucerin Dermo PURIFYER Cover Stick is targeted blemish treatment to reduce the appearance of blemishes & cover imperfections. Eucerin Dermo PURIFYER Cover Stick is a targeted blemish treatment proven to reduce the appearance of blemishes, cover imperfections & calm irritation. Used daily on affected areas, its formula with Salicylic Acid has a comedolytic effect, opening up clogged pores & soothing skin. Non-comedogenic & oil-free.