Self Sealing Shipping Poly Mailer
Self sealing shipping poly mailer is a ready-to-use pouch made from PE film with a built-in adhesive seal that closes securely without tape or extra materials. The seal stays strong in hot or cold weather, so packages stay closed during transit. The film is tear-resistant and waterproof, protecting contents from rain, fog, and handling damage. One mailer replaces multiple layers of tape and packaging, reducing packing time and material use.
- Self-adhesive seal closes securely without tape, reducing packing time and material use
- Strong adhesive holds in extreme temperatures, preventing tampering during transit
- Waterproof and tear-resistant film protects contents in wet or rough handling conditions
- No extra packaging materials needed, cutting down on supply costs and waste
Include the carton size and the monthly volume and the reply will contain a format recommendation, not just a price.
Key Benefits
- Self-adhesive seal closes securely without tape, reducing packing time and material use
- Strong adhesive holds in extreme temperatures, preventing tampering during transit
- Waterproof and tear-resistant film protects contents in wet or rough handling conditions
- No extra packaging materials needed, cutting down on supply costs and waste
- Flat design reduces storage space and shipping volume compared to padded envelopes
- Available in multiple colours to match brand identity or sorting needs
Where It Is Used
- Shipping hoodies, sweatshirts, and casual clothing from e-commerce fulfilment centres
- Sending lightweight retail items like accessories, small electronics, or beauty products
- Distributing branded merchandise or promotional kits in bulk to customers
- Sending documents and small non-fragile goods through postal services
- Using as a cost-effective outer layer for padded mailers when extra cushioning is not needed
Who It Is For
- E-commerce businesses shipping small to medium-sized non-fragile goods
- Third-party logistics providers handling high-volume parcel dispatch
- Retailers sending branded merchandise or promotional items directly to customers
- Manufacturers shipping small parts, samples, or accessories with orders
- Small to mid-sized businesses looking to reduce packaging costs and speed up packing
Problems It Solves
- Manual sealing with tape slows down packing lines and increases labour time
- Weak seals fail in transit, leading to open packages and lost or damaged goods
- Extra materials like tape and padding add cost and waste to each shipment
- Poor weather resistance causes water damage to contents in unsealed or flimsy mailers
- Inconsistent sealing quality leads to customer complaints and return rates
Technical Features
- Self-adhesive seal with four-season adhesive that resists temperature extremes
- PE film thickness between 100 and 130 microns for tear and puncture resistance
- Reinforced edge sealing improves durability during handling and transit
- Waterproof and tear-proof construction protects contents in wet or rough conditions
- Flat, lightweight design reduces shipping weight and dimensional charges
- Available in white, pink, black, green, yellow, and blue for brand visibility
Published Data for Self Sealing Shipping Poly Mailer
Only values published on our own datasheets appear here. If a figure you need is missing, ask for it and we will confirm it in writing.
| Product | Self sealing shipping poly mailer |
|---|---|
| Material | PE film |
| Thickness | 100 ~ 130 mic |
| Sealing Type | Self-adhesive seal |
| Waterproof | Yes |
| Tear-proof | Yes |
| Colour Options | White, Pink, Black, Green, Yellow, Blue |
| Adhesive Type | Four-season adhesive |
| Handle | Integrated self-seal |
Materials
- PE film with no recycled regrind, ensuring consistent seal strength and durability
- Adhesive formulated for year-round performance in hot and cold climates
- Reinforced edge seal for improved resistance to tearing during handling
How It Is Made
PE resin fed into film extrusion line to produce film at 100–130 mic thickness
Adhesive applied to the seal edge using a controlled coating system
Film passed through a cooling and calibrating stage to ensure flatness
Seal edge reinforced with heat sealing for durability
Cut to final size and stacked for packaging
Final inspection for seal integrity and visual defects before packing
How It Is Checked
Incoming PE resin checked for 100% virgin material before extrusion
Seal strength tested at multiple points during production to confirm adhesion
Sample mailers sealed and exposed to temperature extremes to verify performance
Edge reinforcement inspected for uniformity and strength
Final batch checked against order specifications before container loading
Customisation Options
- Custom colour options beyond standard white, pink, black, green, yellow, and blue
- Logo or brand message printed on the front or side of the mailer
- Custom size and thickness within the 100–130 mic range for specific load needs
- Special adhesive formulation for extreme climates on request
How It Compares With the Alternatives
Where another material is the better answer we say so, because a returned shipment costs more than a lost order.
| Taped poly mailers | Self-sealing eliminates tape use, reducing packing time and material cost |
|---|---|
| Paper mailers | Waterproof and tear-resistant, suitable for wet conditions where paper fails |
| Padded envelopes | Lighter weight and lower cost, though less cushioning for fragile items |
| Standard plastic bags | Reinforced seal and adhesive prevent accidental opening during transit |
How to Use It
Open the mailer and place your item inside, ensuring it fits without stretching the seal
Close the flap by pressing it firmly to activate the adhesive seal
Check that the seal is fully closed and smooth to prevent leaks or tampering
Label the mailer with shipping details and drop at the post office or courier point
Store unused mailers flat in a dry, cool place to maintain adhesive performance
Self Sealing Shipping Poly Mailer in Detail
Photographs of the actual product as supplied, not renders.
Self Sealing Shipping Poly Mailer Questions
What is the minimum order quantity for self sealing poly mailers
Order quantity depends on size, thickness, and colour. Send your required dimensions and monthly volume via WhatsApp and we will confirm the minimum for that specification.
Can you print our logo on the mailers
Yes. We print on our own film printing line. Send your artwork and the colour you need, and we will confirm the format and cost.
How strong is the adhesive seal in extreme weather
The adhesive is tested for year-round performance in hot and cold conditions. It maintains strong stickiness even in high heat or freezing temperatures.
Are the mailers waterproof and tear-proof
Yes. The PE film and reinforced edge seal provide waterproof and tear-proof protection for contents during transit.
How are the mailers packed for shipping
Mailers are packed flat in cartons. The number per carton depends on size and thickness. The weight per carton is confirmed on request via WhatsApp or email.
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Quote Self Sealing Shipping Poly Mailer for Your Next Shipment
Tell us the quantity, the destination port and the specification you need. We will confirm what runs, what is stock and what fits in a container.