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#10 Business Envelopes with Security Tint and Secure Seal
It’s no secret that #10 security envelopes are the workhorse of business mailing, and we’ve designed our standard #10 envelope to keep your documents safe and secure behind a strong permanent seal throughout transit. Our most popular business envelope is made from a durable 24lb white wove paper and comes equipped with a low profile flap design. Easily fold and stuff up to 10 sheets of standard letter size paper inside with room for a #8 or #9 return envelope – so you can make it simpler than ever for your clients to quickly return payments to you. And with our dark security tint lining the inside, your confidential mail will stay concealed and secure all the way to its destination. It’s an envelope choice that’s simple enough for everyday letters and statements, yet professional and secure enough for high-profile business communications.
Blue Summit Supplies Secure Seal Types
Peel & Seal!
Simply pull the backing off the envelope's flap to reveal an adhesive strip that can be folded over and pressed down to seal contents safely inside.
Gummed!
Moisten the strip of adhesive found on the envelope's flap and fold over to seal contents securely inside.
Flip & Seal!
No moisture is required, just flip up the bottom flap, fold over the top flap and press to secure contents safely inside.
- Secure Closure Types: Gummed, Flip & Seal, Peel & Seal
- Industry Standard Durable 24lb White Wove Paper
- Cross-Hatch Security Tint Keeps Contents Concealed
Compare Blue Summit Supplies #10 Business Envelopes
Julia
August 27, 2025
We use these envelopes for our small business and they’ve been such a time saver. I was skeptical when they arrived, but once I sealed the first one, there’s been no going back!!! You literally press to seal the envelope and you’re done, no removing a piece of tape or folding a small piece up (both versions we’ve had in the past). I was also impressed with how compactly they are shipped, it makes storing them much easier.
Barbara Stanley
August 6, 2025
All printing papers have increased in price, so it is hard to compare; but this is a really good looking, high-quality envelope that printed really well.
blackgirl
March 23, 2025
Fast shipping and the envelopes were packaged secure, no damage to any. Cheap HOA only sends bills now without envelope and these are great. Hard to find in any office store.
robert c. werstler
February 22, 2025
fun read
Katie B.
February 1, 2025
The product is good and as advertised.But I’m very frustrated that at the time of expected delivery the product still hadn’t been shipped! When you purchase something you expect the product to be deliver when it says it will, not 10 days after the expected ship date window.Good product, terrible seller
Andrea
February 1, 2025
They arrived loose in a cardboard shipping box with the flaps open, not in a branded envelope box. They were in usable condition.
girlslikestarwarstoo
January 19, 2025
Came loose in a big box but at my office they get address labeled anyway so we already had a spot for them. Envelopes were perfect in every other way
Josh
December 9, 2024
So so Much better than all the other types of envelopes. Almost magical. easer to use than:-moisten to seal-peel and seal-fold and seal.The only down side is these are not tamper proof. Once sealed, the envelope can be unsealed with minimal effort and resealed relatively easily, so it would not be appropriate for some things like sending checks or sensitive information.For someone like me who has to send 200 rent billing statements a month, they are a godsend.
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