Forms a strong, long-lasting bond with just a single stroke. Goes on smoothly with no clumps. Lets you create neat, tidy photo albums and scrapbooks quickly and easily. Acid-free and photo-safe. Ideal for paper, cardboard and photos. Dries clear. Washable. Patented cap keeps air out to prevent dry out. Acid-free so it's ideal for photos. Dries clear and wrinkle-free. One stroke quality. Patented cap design prevents drying-out. Washable.