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500#10 Windowless Security Envelopes Self Seal, Peel and Seal, Security Tinted, Printer Friendly Design for Business, Dimensions - 4-1/8 Inch x 9 ½ Inch - Envelopes Letter Size for Mailing
500#10 Windowless Security Envelopes Self Seal, Peel and Seal, Security Tinted, Printer Friendly Design for Business, Dimensions - 4-1/8 Inch x 9 ½ Inch - Envelopes Letter Size for Mailing
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#10 Windowless Security Envelopes Create Completely Secure Mail

We understand how difficult it can be to find secure envelopes that completely secure and hide your envelope contents throughout the mailing...

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Product Review

#10 Windowless Security Envelopes Create Completely Secure Mail

We understand how difficult it can be to find secure envelopes that completely secure and hide your envelope contents throughout the mailing process. We understand this frustration; thus our envelope design protects your contents:

  • Windowless Design is the safest type of envelope. Easily print, write, or add labels to address the envelope.
  • Quick and easy to use Self Sealing design with a strong adhesive that completely secures your contents to prevent them from falling out and being lost or shown to others.
  • Dark Black security tint that is completely opaque and blocks others from seeing your documents
  • Thick and durable 24 LB White Paper stock that completely protects your contents during transit. No need to worry about tearing of the envelope.

Save time sending your mail

Our low profile design makes for easily printing in most HP, Epson, Brother, Cannon, Xerox, and other standard laser and ink jet printers.

100% Money Back Guarantee

We stand behind our products completely. We understand that sometimes buying physical products can be difficult if you cannot physically see what you are buying, however, if our product is not exactly what you are looking for, or does not meet your expectation then send them back anytime for a 100 % refund.



  • Perfectly fit standard 8.5’’ x 11’’ paper sizes and other large documents like invoices, letters, checks, and more
  • Provides complete mail security with dark black security tint that completely hides you mail
  • Self seal design that is quick and easy and guaranteed to stay sealed with no need for tape or glue sticks
  • Printer friendly envelopes with smooth thick paper saves time and frustration while printing with laser or inkjet printers
  • Maintains professional look and feel throughout transit with our durable 24 LB white wove envelope paper

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