See video on how ULTRASEAL works with Formax pressure seal equipment.

Efficient One-Piece Self Mailer
Created from a single sheet of paper, ULTRASEAL self mailers get opened, reduce processing times, and eliminate envelope inventory and waste completely. By eliminating the printed envelope from the process, pressure seal has become the more efficient and “green” alternative when doing office mailings.
Unlike other types of mailers that require glue, heat, or water to seal them, our printer-compatible, all-purpose ULTRASEAL pressure seal forms have narrow bands of pressure-sensitive adhesive that work with our Formax pressure seal machines to completely seal the edges of the piece to create a secure, ready-to-mail document that delivers:
Relyco also offers Pressure Seal Equipment to process all self-mailing forms, including tax forms, payroll checks, invoices, and statements.