When unopened, clay masks are good for about two years. When opened, a clay mask can usually last between one and two years; however, clay masks can expire as early as six months. The shelf life of masks varies greatly.
Clay masks are a great way to get rid of hidden dirt in pores and to add a glow to the skin. Clay masks are full of vitamins.
Together, vitamins A, C, and E enhance collagenase levels, regulate keratinization, act as an antioxidant, reduce wrinkles, work as an anti-inflammatory, and do so much else to make skin clean and radiant. Of course, all these benefits are lost or diminished if the product is expired. Expiration may even lead to skin irritation.
If the Aztec clay mask is hydrated or in liquid form, it can theoretically last for many years. The key is to keep it away from heat and sunlight. It is also strongly recommended to use a clean utensil when scooping out the product to avoid contamination. Store these masks in a nonmetallic air-tight container and away from any strong-smelling substance.
You should also consider the expiration dates of the ingredients, as that can affect the expiration and efficacy of the final product. Fresh ingredients are more likely to produce face masks that have a longer shelf life. The downside of using DIY masks is they don’t last very long. After making your mask, you should put it in a refrigerator ASAP.