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Your cart is empty.Columbian #10 Double-Window Security Envelopes have self-sealing flaps to save you time and money. A Redi-Seal double-flap design keeps envelope adhesives from sticking prematurely—just raise the bottom flap and press to seal. The double-window format displays the sender and receiver address on business statements, invoices and legal documents produced by standard business and accounting software programs. A blue security pattern lines the interior to keep sensitive contents hidden. Stock up on this always-available essential for bulk mailings, payroll and billing cycles. Mail Faster and Cheaper: Columbian #10 Double-Window Security Envelopes have self-sealing flaps that save you time and money on mailings. No Waiting, No Waste: Our secure Redi-Seal envelope flaps don’t require moisture, seal instantly, and keep adhesives from sticking prematurely—just raise the bottom flap in place, press and seal. Trusted Double-Window Format: Double-windows display the sender and receiver addresses for business statements, invoices and legal documents prepared by most business and accounting software programs. Protect Yourself and Customer Data: Shield social security and account numbers with a blue security tint that makes envelopes difficult to see through; a complex security pattern scrambles the appearance of text as an added measure of protection—an important piece of your liability protections. Eliminate the Yuck Factor: We promise you won't miss licking envelopes or those messy moistener sponges in a cup. Redi-Seal envelopes bring mailing into the modern era with a tidier, more hygienic alternative to standard envelopes. Stock-Up Quantities: Boxes with 500 envelopes ensure you're never in short supply. #10 Double-Window. White Wove. 4-1/8 inches x 9-1/2 inches. 500 Per Box.
dee
2025-06-10 13:00:46
Perfect. Worth the price
AZ Desert Gator
2025-05-16 15:54:11
I am very picky about business envelopes: I want the interior security printing, and I want it to be easy to seal (without licking or using moisture.These envelopes are normal, dual-window #10 envelopes just like one would expect. I've included photos showing the interior, as well as what it looks like sealed. You seal them by lifting the flap and folding the top flap down and pressing.I've used a variety of brands of self-sealing envelopes before, and for all of them, including these, I wouldn't mind a little more "stickum" material. I find the stick with no risk of simply opening up, but you can peel the flaps apart with just a little effort. Again, I think this is with all of these types of seals, not just these. These are as good as any I have purchased.For this kind of envelope, I often add a bit of clear tape over the flap just as a precaution.Note that if you are using software to print a check or invoice to be mailed, be sure to confirm that either this window positioning & size works with your software, or that your software lets you adjust the layout to fit the envelope.
Eye Surgical Associates
2025-05-07 16:04:07
not exactly what i thought i was ordering but they work
Gabby
2025-04-30 17:19:14
Box was delivered during a rain/snow storm, but in a plastic envelope, so I'm not sure if this could have negatively affected the self-stick sealing of these envelopes, but they were very dry, didn't appear to be damaged in any way. They did seal, but with just a finger, you could easily re-open the envelope. The box had a '2022' date, so I don't think they were too old... but anyway, the security paper is fine and the quality of the envelopes otherwise appeared to ge good.
Michelle
2025-04-23 14:49:35
The media could not be loaded.
Avid Reader
2025-04-13 17:31:58
I bought these to mail tax bills. Imagine my surprise to find the so called "self-seal" didn't seal at all! They are worthless to me as I am NOT going to either glue or tape each envelope shut! I don't know, nor do I care how old they are, receiving something like this is unacceptable!
Ginger S
2025-03-20 19:58:12
Great for sending mailings out. Very sturdy, easy to use, transparent windows are in the right spot for massive mailing. Great for standard postage.
Raymond
2025-01-22 14:32:25
Columbian makes some of the best envelopes and these envelopes are no different! This is the standard #10 size envelope with self sticking adhesive (sticks well, unlike some of the other lower quality ones!). Clear window on the top left and bottom left of the envelope to show sender and receiver addresses. 500 envelopes for $22.67 (at time of review) is a solid deal!
matawaire
2025-01-06 09:00:28
Parfaite
Customer
2025-01-05 18:29:47
Good quality and great price 10 out or 10
Customer
2024-12-16 17:47:12
These are too big. I purchased these for work. And when you put a cheque in here you can see the amount though the window. Would not recommend.
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