Custom Lock Mini Size Polyester Product String Luxury Embossed Logo Plastic Seal Hang Tag with Numbered Barcode

Plastic seals are security devices made primarily from engineering plastics, designed to prevent counterfeiting, theft, and tampering. They are widely used across various industries and applications, with the core function of ensuring the integrity and safety of items during transportation or use. The plastic seal is a one-time use self-locking seal. Its colors are highly diverse, allowing for customization of colors and printing of logos. The size specifications are also quite varied. The plastic seals have adjustable lengths and possess anti-counterfeiting and anti-tampering functions. They are mainly used in logistics transportation, medical and storage fields, as well as for special sealing of video and beverage products, and plastic labels for bags and clothes.Transportation & Logistics‌
‌Truck and container seals‌: Made from ‌polypropylene‌, these high-strength seals (up to 55 lb breaking strength) secure cargo doors and fuel tanks. Numbered and laser-printed versions allow traceability.
‌Submarine hatches‌: Large plastic seals made from ‌Nylatron™ MC 907 PA6‌ close acrylic spheres in manned submersibles, meeting strict marine safety standards without needing lubrication. plastic seals‌ are tamper-evident or sealing devices made primarily from plastic materials, designed to secure containers, equipment, or systems against unauthorized access, contamination, or leakage. They are widely used across industries for their durability, cost-effectiveness, and traceability.

Plastic seals‌ are widely used across industries to ensure product integrity, tamper evidence, and operational safety, with key applications in food, pharmaceuticals, energy, transportation, and high-precision scientific fields. Typical applications include truck doors, trailer doors, totes, vales, airline catering carts, coin bags, inner drum bags, storage bags, and any container with a hasp or loops.Plastic seals are widely used to secure containers, tanker trucks, and courier packaging bags, preventing illegal opening or tampering with goods during transit. Their single-use design and unique numbering ensure that any manual unsealing leaves clear evidence, thereby safeguarding transportation security. In courier packages and e-commerce logistics, single-use anti-counterfeiting plastic seals (also known as security tags) are commonly adopted. Featuring unique textures or printable corporate logos, they enhance brand recognition while strengthening consumer trust. Utilities & Metering‌
In electric, water, and gas metering, ‌plastic padlock seals‌ (e.g., AC&M Type 7001) provide secure, disposable closure with visible tamper indication. These are especially useful for smart meters read remotely, where infrequent inspections require long-lasting, deterioration-resistant seals. Material Composition & Performance‌
Made from engineering-grade polymers such as:

‌Polypropylene (PP)‌: Resists moisture, chemicals, and UV exposure; widely used in outdoor and transport environments.
‌Acetal Copolymer‌: Offers high strength and low friction; used in reusable or high-cycle applications.
‌Polycarbonate‌: Provides impact resistance and clarity; suitable for inspection-friendly sealing.
‌Plastisol‌: A soft gasket-like liner used in metal caps for glass jars, forming an airtight seal during hot-filling processes. Logistics & Freight‌: Securing trailers, containers, and cargo doors to prevent theft.
‌Food & Pharmaceuticals‌: Induction seals and cap liners maintain sterility and freshness.
‌Banking & Security‌: Used on cash bags and evidence containers for chain-of-custody assurance.

1. Low cost with durable material & Single-use irreversible design
Our plastic security seals combine cost efficiency with durable materials to ensure reliable long-term performance. The single-use irreversible locking structure guarantees that once applied, the seal cannot be reopened or reused without visible damage, effectively preventing tampering and enhancing safety across logistics, transportation, and storage applications.

2. High-strength materials: Made of PP or engineering plastics, offering stable tensile strength
Manufactured from high-quality PP or advanced engineering plastics, our seals provide stable and consistent tensile strength. These materials offer excellent resistance to pulling force, deformation, and environmental stress, ensuring dependable performance in demanding industrial and commercial sealing environments.

3. Factory direct sales with good price, customizable samples available, strict quality control
As a direct manufacturer, we offer competitive pricing without intermediary costs. Customized samples can be developed according to specific requirements, supporting product testing and approval. A strict quality control system is implemented throughout production to guarantee consistent quality and reliability for every batch.

4. Rich export experience with flexible transportation solutions
With extensive export experience and complete export qualifications, we support multiple transportation methods including sea freight, air freight, and land shipping. This flexibility allows customers to choose the most suitable logistics solution based on cost, delivery time, and regional requirements.

5. Anti-counterfeiting and traceability features
Our security seals support laser engraving, unique serial numbering, and tamper-evident markings to ensure authenticity and traceability. Selected models can also integrate RFID technology, enabling digital tracking and real-time monitoring for enhanced supply chain visibility and security management.

6. User-friendly operation for high-frequency use
Designed for convenience, sealing can be completed quickly with one hand and requires no additional tools. This user-friendly design improves efficiency and is especially suitable for high-frequency operation environments such as warehouses, logistics centers, and field inspections.

7. Material Advantages
Common materials include:
HDPE: Durable, chemically resistant, and cost-effective, suitable for general-purpose sealing applications.
PP: Strong resistance to chemical corrosion, ideal for sensitive products such as pharmaceuticals and food-related goods.
Elastomer-blended plastics: Provide a balance of flexibility and resilience, combining the benefits of rigid plastics and rubber-like materials.

8. Lightweight & Easy to Install
Plastic seals are significantly lighter than metal alternatives, helping reduce overall system weight and transportation costs. Their structure allows quick and tool-free installation, improving assembly efficiency while reducing labor time, especially in industries such as automotive, aerospace, and logistics.

9. Tamper-Evident & Secure Tracking
Most plastic security seals are designed for one-time use with clearly visible locking mechanisms. Once broken, they cannot be resecured without detection. Features such as laser-printed serial numbers, barcodes, color coding, and holographic elements ensure full traceability and compliance in logistics, elections, and pharmaceutical sectors.

10. Customizable & Adjustable Design
Pull-tight plastic seals can be adjusted to fit different container sizes, making them ideal for irregular packages and variable cargo. This flexibility enhances usability across multiple applications, including securing transport containers, utility equipment, and voting systems.

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