With a convenient pen style, this DotLiner adhesive applicator provides smooth and accurate application of glue. The patented dot-type glue leaves no stringy drippings to clean up and is easy to apply. After laydown, the glue is visible for precision adhering and dries clear. DotLiner glue is acid-free, photo-safe and archival-safe. Retractable pen style keeps the glue roller protected. Durable plastic applicator is refillable. Refill cartridge (sold separately) simply drops into the holder.