Clay is a natural occurring substance. The powder that you are receiving has just been dehydrated and grounded. If you keep the jars dry and uncontaminated, you can keep it for a long time. We recommend not keeping it more than 2 years though. To keep the clay powder mix uncontaminated, make sure to use a clean, dry spoon every time.
If you purchase a premixed clay mask, it can last you several years as well. Make sure that you don’t contaminate it with dirty spoons, double dipping, or your fingers. When stored properly in a dry, cool space, you can keep using it for years. We recommend no more than 2 years. The mixed clay masks only come with ingredients that won’t cause quick deterioration, such as vitamin C, Cacao, and essential oils. Once water touches these ingredients, it will start to break down. That is why we sell these natural masks as dry powders so that you can mix a fresh batch every time.