Product Guide

The Difference Between Self-Seal and Peel-and-Seal Padded Envelopes

Self-seal vs peel-and-seal: which closure type is right for your padded envelopes.

2 min readUpdated April 2025

The difference

Peel-and-seal: remove backing strip to expose adhesive, press to seal. Permanent, tamper-evident.
Self-seal (lip and tape): fold-over flap with adhesive. Quick but less permanent.

Quick answer

Peel-and-seal is stronger, more tamper-evident, and the professional standard. Self-seal is slightly faster but less secure. For business and e-commerce use, always choose peel-and-seal. The price difference is minimal (1-2p per envelope) but the security difference is significant.

Security comparison

Provides clear evidence of tampering.

Less tamper-evident than peel-and-seal.

The security difference matters most for valuable contents.

Which to choose

Peel-and-seal for business, e-commerce, and valuable items. Self-seal only for very low-value, casual mailings where security is not a concern.

From ProcuraPack

Peel-and-seal padded envelopes

Secure peel-and-seal envelopes from ProcuraPack.

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Frequently asked questions

Peel-and-seal has a backing strip for permanent, tamper-evident closure. Self-seal has a fold-over flap.

Peel-and-seal is significantly more tamper-evident.

Only 1-2p per envelope more than self-seal.

Peel-and-seal is the professional standard.

You can, but it adds time and cost. Peel-and-seal is the better solution.

Part of our guide

Product Guide: Padded Envelopes

Expert guides on padded envelopes and cushioned mailers for safe, cost-effective shipping.

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