Strong enough for the office. Permanent; Acid free; Photo safe; Washable; Safe, non-toxic. Works on a variety of paper types including cardboard, foamboard, and display board. Seal envelopes; Photo albums; Apply labels; Business presentations; Mount pictures; Home and office; Charts and graphs; Projects. Uses: Neat, easy and convenient paper gluing. Goes on smooth and dries fast, clear, and colorless.