Since 1923, Union Rubber has made Acid Free "Best-Test" in only one way-with a specially-blended and treated formula which uses pure natural white rubber from the Far East. Unlike multi-purpose glues, Best-Test does not shrink or wrinkle the paper when adhering them. Throughout the years, artists, draftsmen, and art teachers agree that "Best-Test" is the overwhelming choice of paper cement. Today crafters use "Best-Test" for many applications (e.g. masking for rubber stamping, balloon decoration, stain glass, scrap booking, leather craft, and etc:) available in 4, 8, 16, and 32 oz.: 1, 5, and 55 gallon containers. ©2000 Union Rubber, Inc. 232 Allen Street, PO Box 1040, Trenton, NJ 08606-1040 Voice: 1-609-396-9328, Toll Free: 1-800-334-8219, Fax: 1-609-396-3587 Email: contact@best-testproducts.com