For envelopes and crafts: Fast-drying adhesive formula moistens as it seals; up to 1,500 envelopes per 50 mL bottle Patented spill proof top: No-clog spring-valve applicator won’t leave a mess, even if tipped over Safety tested: Non-toxic, non-flammable envelope sealing formula cleans up with plain water; sturdier and longer lasting than glue sticks Many uses: A tidy solution for gluing envelopes or for any paper craft project; stock up with a box home, school and office Plentiful 4-packs: Seal up to 6,000 envelopes; the perfect envelope moistener bulk buy for wedding invitations and other big mailings