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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
Wathan48
2025-09-07 16:17:49
First and foremost, I do not get paid to write reviews. I also did not receive this product for free in exchange for a good review.I got these yesterday and I’m definitely pleased with the quality. These seem to be as good as major name brand envelopes for significantly cheaper.These are security envelopes, meaning people will have a hard time reading through them. The self sealing adhesive is very good as well. It’s much better than the name brand that I bought at the local store, where the adhesive isn’t strong enough to keep the envelope closed.I don’t mail all that often, so I figure 500 envelopes will be plenty for a year. I’m hoping the adhesive lasts as long. I will update in the months to comes.
ccombi
2025-09-02 17:45:18
These #10 envelopes are a good item and nice not to lick tab to seal. I use them for bulk mailing and they are good quality. I will buy more as needed.
Lovely Manthy
2025-08-20 10:19:03
Love the security of the product alone with it's cost! I recommend this product to anyone looking to purchase! Great product!
securitypro
2025-08-06 09:13:35
This envelope is perfect for heavy use office or home situations. The envelope is a #10, perfect for the 8-1/2â€x11†letter. It has a peel-off backing so no more licking the envelope! Remember George Costanza and his fiancé that succumbed to the glue on the envelope? He’d still be engaged had they ordered these envelopes! [Is that a good thing?]A subtle thing I noticed about these envelopes is that they are light weight, more so than similar products. The great thing about that is with rising postage, weight matters. Using these envelopes could make the difference in saving you tens or hundreds of dollars over the long hall, saving on postage by weight.I’m a prolific letter writer and each letter could go to 10 or 20 recipients, so I go through envelopes fast. This will definitely be a reorder item, and you can’t beat the price.
Joe
2025-08-02 14:40:34
The price of this product is great. The quality is excellent, a terrific product at a great price.
ct beauty
2025-07-31 16:47:28
Shipped fast!
Get Rich
2025-07-30 14:15:20
The envelopes are excellent: self seal, designed for secure mailing, and works very well with my printer. I have used self seal envelopes before that do not seal very well, but these do.
cccdeals
2025-07-14 10:34:10
The media could not be loaded.
Erick Montreal
2025-06-30 18:49:22
Trop chère
Abisai Oviedo
2025-06-13 11:05:58
La calidad es excelente.El gran detalle es que el paquete venÃa incompleto, de los 500 mencionados, faltaron alrededor de 10 sobres.
Wathan48
2025-05-25 20:02:10
First and foremost, I do not get paid to write reviews. I also did not receive this product for free in exchange for a good review.I got these yesterday and I’m definitely pleased with the quality. These seem to be as good as major name brand envelopes for significantly cheaper.These are security envelopes, meaning people will have a hard time reading through them. The self sealing adhesive is very good as well. It’s much better than the name brand that I bought at the local store, where the adhesive isn’t strong enough to keep the envelope closed.I don’t mail all that often, so I figure 500 envelopes will be plenty for a year. I’m hoping the adhesive lasts as long. I will update in the months to comes.
ccombi
2025-05-17 10:20:45
These #10 envelopes are a good item and nice not to lick tab to seal. I use them for bulk mailing and they are good quality. I will buy more as needed.
Lovely Manthy
2025-05-11 11:01:18
Love the security of the product alone with it's cost! I recommend this product to anyone looking to purchase! Great product!
securitypro
2025-05-03 15:02:06
This envelope is perfect for heavy use office or home situations. The envelope is a #10, perfect for the 8-1/2â€x11†letter. It has a peel-off backing so no more licking the envelope! Remember George Costanza and his fiancé that succumbed to the glue on the envelope? He’d still be engaged had they ordered these envelopes! [Is that a good thing?]A subtle thing I noticed about these envelopes is that they are light weight, more so than similar products. The great thing about that is with rising postage, weight matters. Using these envelopes could make the difference in saving you tens or hundreds of dollars over the long hall, saving on postage by weight.I’m a prolific letter writer and each letter could go to 10 or 20 recipients, so I go through envelopes fast. This will definitely be a reorder item, and you can’t beat the price.
Joe
2025-04-18 13:55:30
The price of this product is great. The quality is excellent, a terrific product at a great price.
ct beauty
2025-04-09 18:44:06
Shipped fast!
Get Rich
2025-03-27 15:46:40
The envelopes are excellent: self seal, designed for secure mailing, and works very well with my printer. I have used self seal envelopes before that do not seal very well, but these do.
cccdeals
2025-03-23 10:22:53
The media could not be loaded.
Erick Montreal
2025-03-07 13:21:27
Trop chère
Abisai Oviedo
2024-12-23 16:11:31
La calidad es excelente.El gran detalle es que el paquete venÃa incompleto, de los 500 mencionados, faltaron alrededor de 10 sobres.
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