BEST TONE-Premium Best-Test Rubber Paper Cement. Best-Test is acid free and 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. Crafters use Best-Test for many applications including masking for rubber stamping, balloon decoration, stain glass, scrap booking, leather craft, etc. This package contains one 4oz can of rubber cement. Contents are extremely flammable and cannot be shipped via air. Conforms to ASTM D 4236. Made in USA.