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Relyco DURASEAL Secure Business Envelopes

Questions? Check Out Our Paper Folders Guide.
Our great selection of Relyco DURASEAL business envelopes are designed to be secure, durable and affordable. These envelopes are designed from the ground up to provide your checks, bills, invoices and other sensitive documents with the security they need while traveling through the USPS system. Our great selection of Relyco envelopes includes both #9 and #10 envelope sizes with single and double window configurations. These envelopes are also available with a traditional sealing flap or a bottom (reverse) flap.

These envelopes are available with in inside security tint, which makes contained material impossible to see, even when held to a bright light. Not only are these business envelopes secure, they are also designed to work great with Formax folder inserters (aka envelope stuffing machines). Take advantage of these great low prices and buy your Relyco DURASEAL secure business envelopes today!

Business Envelopes

Relyco #9 Single Window Business Envelope

Description: Our line of Relyco Model 44 envelopes measure in at 3-7/8" x 8-7/8" and feature a #9 envelope size with a single window. These are perfect for a variety of mailing applications. The inside of this envelope is coated with a security tint, making contained material impossible to read.
Quantity per Case:2,500


#10 Professional Business Envelope with Single Window

Description: Save your business money by getting your #10 envelopes from ABC Office! These Relyco Model 58 envelopes are perfect for daily use and will get your mail to its recipients in tact. These envelopes work great with Formax envelope stuffing machines. Designed with quality in mind, this envelope includes a security tint that protects contained documents from unwanted viewing.
Quantity per Case:2,500


Relyco #10 Single Window Bottom Flap Business Envelope

Description: Our Model 60RF Relyco #10 envelopes are prefect for mass mailing and work great with Formax folding and inserting machines.
Quantity per Case:2,500


Relyco Business Envelope #9 Double Window

Description: Our Relyco Model 45 envelopes are made from quality materials and designed to handle mailing without falling apart. This envelope measures in at 3-7/8" x 8-7/8", which is a #9 size envelope. This envelope features two windows. The inside of this envelope is coated with a security tint that prevents unwanted viewing of pre-opened contents.
Quantity per Case:2,500


Relyco #10 Double Window Business Envelope

Description: Do you need a high-quality #10 envelope that can handle the mailing process? You should seriously consider using our Relyco Model 59 envelope. This envelope is ideal for use with Formax folding and inserting machines and includes 2 windows.
Quantity per Case:2,500


Relyco #10 Double Window Bottom Flap Business Envelope

Description: If you need a #10 envelope that has two windows that is also compatible with folding and inserting machines, you may want to consider using our Relyco Model 61RF envelope. This envelope measures 4-1/8" x 9-1/2" and is designed to not only be affordable, but also extremely durable. The #61RF also includes some high-end security features such as a lined security tint and windows designed to conceal MICR information.
Quantity per Case:2,500


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