Any artwork of value, either monetary or sentimental, should not be permanently dry mounted. This would include original, limited editions or collectable art. In some cases, this type of art may be semi-permanently mounted using a product such as Artcare Restore®. Also any artwork that is susceptible to melting should never be dry mounted. This would include wax or pastel-based art, color copies or signed posters and prints. There are alternative, permanent mounting products that may be used in these cases.