Peel & Seal
Peel & Seal Envelopes have a strip that peels off like a sticker to reveal the adhesive gum surface.
The main benefit over self-seal envelopes is if you keep them in storage for periods longer than 6 months the gum won't dry out.
Self-Seal Envelopes have 2 gummed strips that when pressed together securely close the envelope.
Self-Seal Envelopes are available on request, cost £POA.