High Security Plastic Seals Numbered Tamper Tags Handwriting Waybill Express Parcel Cable Tie Sealing Tag

Plastic security seals are high-strength tamper-evident security devices made primarily from durable engineering plastics, specifically designed to effectively prevent counterfeiting, theft, unauthorized access, leakage, and tampering risks in various industrial environments. They are widely used across multiple industries and application scenarios, playing an essential role in ensuring the integrity, authenticity, and safety of goods during transportation, storage, handling, and operational use. The plastic seal is a single-use self-locking security seal that is engineered for one-time application; once locked, it cannot be reopened without visible damage, providing reliable tamper-evident protection and security assurance.

These plastic seals feature a wide range of color options and flexible customization capabilities, allowing customers to choose colors based on branding or operational requirements. They support logo printing, barcode printing, and serial number marking for enhanced identification, traceability, and anti-counterfeiting management. The size specifications are highly varied and adaptable to different industrial sealing needs. In addition, the plastic seals are designed with adjustable length structures and strong locking mechanisms, ensuring stable performance and effective resistance against tampering, theft, and counterfeit interference in complex working environments.

They are mainly used in logistics transportation, freight security systems, medical equipment sealing, warehouse storage management, and industrial packaging applications. They are also widely applied in special sealing scenarios such as video equipment protection, beverage product sealing security, and quality inspection processes. In addition, they are commonly used as plastic labeling and identification solutions for bags, garments, and consumer goods packaging, helping improve traceability, operational efficiency, and brand protection across multiple industries.

Transportation & Logistics:
Plastic security seals are widely used in modern logistics and transportation systems to ensure cargo safety, prevent unauthorized access, and maintain supply chain security. For truck and container sealing applications, high-strength plastic seals made from polypropylene materials are commonly used, offering excellent tensile strength and reliable locking performance, with breaking resistance reaching up to 55 lb depending on specifications and design. These seals often feature sequential numbering, laser printing, or barcode marking systems to support full traceability and logistics management.

Plastic seals are widely applied across industries to ensure product integrity, tamper evidence, and operational safety, with major applications in food, pharmaceuticals, energy, transportation, and high-precision scientific sectors. Common uses include securing truck doors, trailer doors, totes, valves, airline catering carts, coin bags, inner drum bags, storage bags, and any container equipped with a hasp or loop mechanism.

Plastic seals are also commonly used to secure shipping containers, tanker trucks, and courier packaging bags, effectively preventing unauthorized opening or tampering with goods during transit. Their single-use structure and unique numbering system ensure that any manual removal leaves clear visible evidence, thereby enhancing transportation safety and cargo security.

In courier services and e-commerce logistics, single-use anti-counterfeit plastic seals (also known as security tags) are widely utilized. With custom textures or printable company logos, they help improve brand visibility while strengthening consumer confidence and trust.

Utilities & Metering
In electric, water, and gas metering applications, plastic padlock seals (such as AC&M Type 7001) provide secure, disposable locking with clear tamper indication. These seals are particularly suitable for smart meters with remote reading, where inspections are less frequent and require durable, long-lasting sealing solutions.

Material Composition & Performance
Manufactured from engineering-grade polymers such as:
Polypropylene (PP): Resistant to moisture, chemicals, and UV exposure, widely used in outdoor and transportation environments.
Acetal Copolymer: Provides high strength and low friction, suitable for reusable or high-cycle applications.
Polycarbonate: Offers strong impact resistance and transparency, ideal for inspection-based sealing.
Plastisol: A soft liner used in metal caps for glass containers, forming airtight seals during hot-filling processes.

Applications
Logistics & Freight: Securing trailers, containers, and cargo doors to prevent theft or unauthorized access.
Food & Pharmaceuticals: Induction seals and cap liners help maintain sterility and product freshness.
Banking & Security: Used on cash bags and evidence containers to ensure chain-of-custody control and tamper evidence.

1.Low cost with durable material & Single-use irreversible design

2.High-strength materials: Made of PP or engineering plastics, offering stable tensile strength

3.Factory direct sales with good price, Customizable samples available. Strict quality control.

4.With rich export experience and export qualifications, we can offer various transportation methods including sea, land and air.

5.Anti-counterfeiting and traceability: Supports laser engraving, unique serial numbering, tamper-evident markings; certain models integrate RFID technology for digital monitoring.

6.User-friendly operation: Sealing can be completed with one hand, tool-free, suitable for high-frequency operation environments.

7.Material Advantages‌
Common materials include:

‌HDPE‌: Durable, chemically resistant, and cost-effective for general-purpose sealing.
‌PP‌: Resists chemical deterioration, ideal for sensitive goods like pharmaceuticals.
‌Elastomer-blended plastics‌: Combine flexibility and recovery, bridging the gap between rigid plastics and flexible rubbers.

8.Lightweight & Easy to Install‌
Plastic seals are significantly lighter than metal alternatives, reducing overall system weight—especially beneficial in automotive and aerospace applications. Their design often allows for tool-free installation, speeding up assembly processes and lowering labor costs.

9.Tamper-Evident & Secure Tracking‌
Many plastic security seals are ‌one-time use‌ with visible locking mechanisms. Once broken, resealing without detection is nearly impossible. Features like ‌laser-printed serial numbers‌, ‌barcodes‌, ‌color coding‌, and ‌holograms‌ enable full traceability and audit compliance in logistics, elections, and pharmaceuticals.

10.Customizable & Adjustable Design‌
Pull-tight plastic seals can be adjusted to fit various container sizes, making them ideal for irregularly shaped packages or variable cargo. This adaptability enhances usability across different sectors—from securing voting machines to sealing utility boxes.

1. Q: Who are we?
A: We are based in Shandong, China, start from 2012, sell to Mid East, South Asia, Northern Europe,Africa, North America, Western Europe. There are total about 200-300 people in our office.

2. Q: How can we guarantee quality?
A: Always a pre-printing sample before mass production;
Always final Inspection before shipment;

3. Q: What can you buy from us?
A: bolt seal,cable seal,plastic seal,meter seal,metal strap seal, etc.

4. Q: Why should you buy from us not from other suppliers？
A: 12 years experiences, 300 sets of models with different style , meet your different demands with fast delivery. All our material is environmental, we won many honors from government. Our goods are popular in 300 countries.

5. Q: Do you accept custom orders?
A: Yes. We provide comprehensive OEM & ODM customization services, including:
LOGO printing and unique serial numbering
Customized sizes, colors, materials, and packaging

6.Q: What certifications do you have?
A: We maintain a complete and internationally recognized certification system, including:
ISO 9001 – Quality Management System
ISO 14001 – Environmental Management System
ISO 45001 – Occupational Health & Safety Management System
ISO 17712 – High-Security Seal Certification
Third-party test reports from SGS and other authorized institutions