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Sealed & Secure: Exploring Envelope Closure Options

Sealed & Secure: Exploring Envelope Closure Options


There are several different ways to seal your envelopes. The method you choose can vary depending on your preferences and needs. In this blog we explore the three most commonly used methods. Understanding these methods will help ensure your mail stays secure and presents a polished appearance.

Peel & Seal Envelopes
This is one of the most secure ways to seal an envelope as it involves peeling away a release tape from the flap to expose a latex strip. When pressed, an instantaneous and unbreakable bond is formed. There are two types of peel and seal adhesive available:

  1. Cold Melt: Envelopes sealed with cold melt adhesive feature a single band of adhesive covered by a large silicone paper strip. These envelopes typically have a shelf life of 2 years.
  2. Hot Melt: This is our most common type of peel and seal envelopes. The hot melt adhesive boasts a narrow band of adhesive with a higher gram weight compared to standard peel and seal. With hot melt, we can guarantee a shelf life of up to 5 years. Notably, hot melt peel and seal acts as a tamper-proof security seal, as opening the envelope without tearing the flap is impossible. This sealing method is also known as Super Seal, Strip Seal, or Peel and Stick.
The COVID-19 pandemic led to a shift towards peel and seal envelopes, given their significant advantage in reducing the risk of viral transmission compared to gummed envelopes. With peel and seal envelopes, there is no need for licking or moistening the adhesive, eliminating potential contact with saliva and reducing the risk of transmitting any contagious pathogens.
 Peel&Seal Envelope
Gummed Envelopes
 This is the most common way in which to seal envelopes. Gummed envelopes have a gum adhesive strip on the flap that can be moistened to create a secure seal.
The gum used on these envelopes is water soluble and composed of a blend of synthetic resin and destrin making it biodegradable and eco-friendly.
Gummed envelopes are specifically designed for automatic machine inserting, allowing the sealing process to be automated by mailing machines.
When stored properly, these envelopes can maintain their quality for several years.
 Gummed Envelopes
Self-Seal Envelopes
Self-seal envelopes feature a latex strip on each flap which when pressed together forms an instant bond.
This sealing method can also be known as Dri-Seal, Fast-Seal, or Press-Seal.
The latex used in these envelopes is derived from a combination of rubber and ammonium substrate, making it a natural product.
Typically, the shelf life of these is guaranteed for twelve months. However, under appropriate storage conditions the duration can be extended.
To maintain the quality of self-seal envelopes they should be stored at a consistent temperature. That’s why we ensure careful temperature control in our warehouses.
 Self Seal Envelopes 
Choose the ideal envelope sealing option that suits your needs and priorities. Whether it's gummed, peel and seal, or self-adhesive, each has its own benefits. Consider factors like security, efficiency, and health when making your decision. Seal your envelopes with confidence and convenience.


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