Preserved moss is real moss that has been treated with a preservative solution. This solution can be made from a variety of chemicals, but the most common one is glycerin. Glycerin is a clear, odorless, and non-toxic substance that helps to keep the moss moist and prevents it from drying out. Moss is an easy-to-preserve plant that can be used in a variety of ways around the house. For example, you can preserve moss for wall art and create an outstanding wall decor for your kitchen or bathroom.