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 materials of all sorts, foam sheets and boards, poster board, some plastics, some metals and much more. Goes on smooth and dries clear. It is safe, non-toxic, as well as acid free and photo safe. Easily washes off hands and out of clothes.