Product details most commonly list sulfur concentrations of 5%–6%.
Directions typically recommend leaving masks on up to about 10 minutes for regular use and applying them 2–3 times per week. Some products also offer sulfur as an overnight spot treatment to be used up to three times weekly.
Formats shown include clay face masks, overnight spot treatments, and dual-step treatments (dot-style spot application plus a sheet mask).
Warnings include keeping products out of reach of children, avoiding eye contact (they can be eye irritants), and notes that some items are intended for adult use only.
They claim to reduce excess oil and shine, deep-clean and decongest pores, and help minimize the appearance of pores and blackheads.
