Acid free Best-Test Paper Cement is made 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. In addition to school, drafting, and art uses, it"s also used for masking for rubber stamping, balloon decoration, stained glass, scrapbooking, leather craft, and more.Can be removed or thinned with Bestine Thinner .(Note: gallons of Best-Test are sold in cartons of 4 only and must be shipped via motor freight).