Rub-on adhesive forms a strong, long-lasting bond with just a single stroke. Glue stick applies smoothly with no clumps on paper, cardboard, photos or fabric. Lipstick-type applicator twists up for use and retracts for no-mess storage. Color stick goes on purple for precise application and dries clear. Glue is acid-free, odor-free, photo-safe and washable. Nontoxic glue conforms to ASTM D-4236.