? Klingy Envelope Moistener ?Envelope moistener features a quick-drying, water-based adhesive to quickly seal envelopes and most paper-based items. Easy-to-use bottle utilizes a nonclogging applicator that lays down smoothly for clean, consistent application. Envelope moistener is perfect for volunteer workers, public relation consultants, promotion directors and more. Nontoxic moistener is designed to seal more than 1,500 envelopes