Storage Gum for all metal plates 1-quart: A special blend of synthetic and natural gums and polymers that provide optimal protection against humidity, oxidation, fingerprints, dust, and scratches during storage, up to and beyond 1 year. This product is not an asphaltum base. Multiple Benefits *Works with all metal printing plates. *Will not cause blinding. *Easily removed for quick clean restarts even after long term storage. *Light formulation that is not sticky or tacky. *Very Easy to work with. *NON VOC *BIODEGRADABLE