About Us

GCSEAL is a professional manufacturer and wholesales of security seal in China

About Us

Home About GCSEAL Company Profile

WENZHOU GUANGCHANG locates in WENZHOU city is well-known as a specialist designer and manufacturer of security seals and nowadays becoming as one of the largest security seals manufacturers in China and the products are widely acknowledged as innovative in design and advanced in security features.

Although WENZHOU GUANGCHANG is a new name in the industry, our expertise working as a supplier of a full range of security seals and container seals is based on years experience on the security seals market.

We offer a full range of quality security seal products such as container seals, bolt seals, cable seals, plastic seals, meter seals, padlock seals at very competitive prices and better services, the concept of” win-win” has propelled us to be the preferred supplier for many chief customers both domestic and abroad.

WENZHOU GUANGCHANG is an ISO 9001:2008 certified company and the products are designed and manufactured in accordance with the ISO/PAS 17712 standard and CE requirements, many of our bolt seals and cable seals are certified as “HIGH SECURITY SEALS” by latest version of ISO/PAS 17712:2013 DAYTON T. BROWN in the US.

Main:Security Seals
Cable seal, cable lock, cable security seal, cargo seal, truck seal, trailer seal, pull tight cable seal, wire seal, container cable seal, security wire seal etc. Indicative Seals Plastic seal, meter seal, twist seal, plastic security seal, padlock seal, bag seal, bag guard seal, barcode seal, disposable seal, plastic strap seal, postbag seal, plastic band seal, pull tight plastic seal, cash bag seal, hasp security seal, hasp lock seal, hasp seal, plastic bulldog seals, poly seal etc.

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Why Use Security Seals?

any seals are being developed to meet specific criteria for different applications, some of these criteria are defined by programs such a C-TPAT (Customs Trade Partnership Against Terrorism) and other international requirements, but often the requirements for security seals are entirely defined by the application or specific situation in which the security seals are being used.

ISO Standards For Security Seals

Testing to determine a security seals physical strength (as barriers to entry).ISO 17712 defines three types of classes of seal strength or barrier capacity: “I” for Indicative; “S” for Security; and “H” for High Security. C-TPAT requires the use of “H” class seals. Suppliers must use independent third party test laboratories to validate a seal’s classification. Labs must be accredited according to ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories) to perform testing specific to ISO 17712.


the deadline date for all High Security Seals to be compliant with the new requirements of ISO17712:2013 – the international standard for mechanical seals. For seals to be compliant they must be categorized and marked “H” as High Security Seals when undergoing mechanical testing by an independent ISO 17025 accredited laboratory (Clause 5) and the manufacturer must be certified to both ISO9001

What is ISO 17712?

ISO (International Organization for Standardization) is the world’s largest developer of voluntary International Standards. A standard is a document that provides requirements, specifications, guidelines or characteristics that can be used consistently to ensure that materials, products, processes and services are fit for their purpose. ISO International Standards ensure that products and services are safe, reliable, and of good quality.


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