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Collection: Self Seal

Press to close - no strip, no moisture. Self-seal envelopes and mailers use a pre-applied pressure-sensitive adhesive that bonds on contact when the flap is pressed down. Faster than gummed, simpler than peel and seal, and available across business envelopes, coloured formats and mailing bags.

Browse related: Peel and Seal | Self Seal Business Envelopes | Business Envelopes

6 products

Manila Gummed Business Envelopes - Wallet 80gsm C6 - 114 x 162mm
Eco Product

Manila Gummed Business Envelopes

Regular price From £0.07
Sale price Regular price
Manila 90gsm Business Envelopes - C4 - 229 x 324mm

Manila 90gsm Business Envelopes

Regular price
Sale price From £0.08 Regular price £0.18
White Blue Opaque Gummed Business Envelopes - 100gsm With Window DL - 110 x 220mm

White Blue Opaque Gummed Business Envelopes

Regular price
Sale price From £0.07 Regular price £0.12
White Blue Opaque Self Seal Business Envelopes - Without Window Wallet C5 - 162 x 229mm

White Blue Opaque Self Seal Business Envelopes

Regular price
Sale price From £0.07 Regular price £0.08
White 90gsm Self Seal Business Envelopes - C5 - 162 x 229mm

White 90gsm Self Seal Business Envelopes

Regular price
Sale price From £0.10 Regular price £0.11
Manila Self Seal Business Envelopes - Wallet DL - 220 x 110mm

Manila Self Seal Business Envelopes

Regular price
Sale price From £0.07 Regular price £0.11

More About "Self Seal"

Self Seal feature a self-seal closure, pressure-sensitive self-adhesive closure requiring no moisture or liner removal. The range covers over 5 products across over 15 sizes and 2 colours, at 75–100gsm paper weights.

Benefits of Self Seal

  • Self-Seal closure — pressure-sensitive self-adhesive closure requiring no moisture or liner removal.
  • Multiple sizes — including C5 - 229 x 162mm, C4 - 229 x 324mm.
  • Colour range — 2 colours across the range.
  • Paper weight choice — 75–100gsm.
  • Royal Mail compatible — qualifies as large letter or letter within standard weight limits.

Frequently Asked Questions

When should I choose self-seal envelopes?
Self-Seal envelopes are the preferred choice for office dispatch, business mailings and any application where speed of closure is important. The self-seal closure pressure-sensitive self-adhesive closure requiring no moisture or liner removal.

What sizes are available?
Available in over 15 sizes: 60 x 60mm, 67 x 98mm, 89 x 124mm, 102 x 108mm, 102 x 152mm, 102 x 216mm. Standard formats include DL, C6, C5 and C4 for correspondence and documents, plus square formats for greeting cards.

Do these come in colours?
Yes — 2 colours are available across the range. Coloured envelopes with a self-seal seal are particularly popular for greeting cards and invitation campaigns.

Customer Feedback

What Our Customers Say

See why we’re trusted as by thousands of UK businesses for packaging and envelopes through our customer reviews.

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Envelope Printing Customer

Branded envelopes that felt event-ready

We needed branded envelopes for a client event and they looked exactly right. The team were helpful from start to finish and made sure everything moved quickly so we could meet our deadline. A really smooth experience for printed envelopes.

Woman with long brown hair wearing a beige top against a plain background

Envelope Customer

Quick fix after an order issue

My order arrived with a problem, but after I emailed the team I received a quick response and the issue was sorted straight away. It was handled professionally and made me feel confident about ordering again.

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First Time Customer

Fast support when delivery went wrong

There was an issue with the courier delivering to my address, but the team dealt with it quickly and kept things moving. A replacement was arranged and the previous order was refunded without any fuss. It gave me a good first impression and I would order again.

Woman wearing a yellow sweater with a plain background

Wholesale+ Member

Reliable support for regular orders

The courier caused a problem, but Jess and Kelly were quick to help and did everything they could to sort it. They also looked at the products I order regularly and helped make future orders easier. Good value, good quality and service that feels genuinely useful.

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Envelope Printing Customer

Easy custom printed envelope order

Ordering custom printed envelopes was straightforward from the start. James answered my questions clearly, the order arrived when expected and the finished envelopes were great quality. I would be happy to use the service again.

Man wearing a light gray sweater over a collared shirt on a plain background

Wholesale+ Member

Helpful and easy to deal with

A very straightforward company to buy from. The team were helpful, clear with communication and easy to deal with, which makes a big difference when ordering packaging regularly.

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Sample Customer

Helpful advice before ordering

The team helped point me towards the right product before I placed my order. It made the decision much easier and gave me confidence that I was choosing the right packaging for what I needed.

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Packaging Customer

Useful support for flat pack cartons

Useful support for flat pack cartons