X-Treme School Glue Stick is specially formulated to work on bigger, tougher projects. Use it for everything from craft items to science fairs and many other school projects. The extra-strength formula works on a variety of surfaces, like paper, photos, wood, craft sticks, fabric, ribbon, buttons, gems, craft materials, foam sheets, foam board, poster board, cardboard, some plastics, some metals and much more. It also goes on smooth and dries clear. It is safe and nontoxic as well as acid-free and photo-safe. It easily washes off hands and out of clothes.