ACNOMEL® Acne Mask Chattem Salicylic Acid Acne Therapy   Indications And Clinical Uses: For treatment of acne. Precautions: Avoid contact with eyes. tag_DosageDosage Dosage: Splash face with warm water. Apply the acne mask over entire face, avoiding eyes. Leave on as a mask for 10 minutes. Rinse off with warm water. Use once or twice weekly. Availability And Storage: Each mL contains: salicylic acid 1.5% in cream base with 100% natural clays. Tubes of 70 mL.