Use these convenient pint size bottles to fill a reservoir or to refill an existing E-Z Seal container. Use these convenient size bottles to re-fill the moisener tank in your meter for sealing envelopes. Optimizes performance of your mailing system. Use E-Z seal envelope sealing solution to keep your mailing machine running smoothly. Effective Formula: This is specially designed to work with the sealing unit and tape in your mailing machine; It Seals envelopes consistently and keeps them tightly sealed so your mail arrives intact. Quality Products: For results your business can rely on; we recommend using quality supply products with our product line.