Yes Paste is an all-purpose adhesive, designed for high performance in a wide range of applications. Yes Paste will not wrinkle or curl delicate or lightweight materials, due to its low water content. It is slow-setting, allowing for repositioning and adjust of materials. In addition, it is 100% acid free and has a 6.5 pH, making it perfect for archival use. It's used for bookbinding and many other areas of conservation. It is not recommended for use with photographic materials. Clean-up is a breeze with Yes Paste; simply dilute excess glue with warm water. Composition: Water based corn dextrin, water and preservative. Physical properties: Transparent & permanently flexible when dry. Usage: Apply with a stiff brush