Full Process Guide for Imported Sealant Agency

Core Compliance Prerequisites and Business Logic of Imported Sealant Agency

When delivering imported sealant agency services,the first step is to clarify the compliance attributes of the product itself.Last year,a customer imported construction sealant from Singapore,which was misjudged as ordinary chemical product without pre-inspection of MSDS documents.During inspection at Shanghai Port,it was found to contain a small amount of solvent components,which directly triggered the customs 3C inspection procedure and resulted in 12 days of cargo detention.This is a typical risk of attribute misjudgment: though most sealants are non-hazardous chemicals,some special formulas (such as solvent-containing adhesives) may be included in the hazardous chemical regulatory scope.

As an agency serving Shanghai Port,we need to clarify three prerequisites first: first,confirm accurate HS Code classification (special attention shall be paid to declaration elements for special function sealants under Chapter 38269090 newly added in 2026); second,verify the certificate of origin (RCEP member countries can enjoy tariff preferences); third,prepare MSDS documents conforming to GB 30000-2013 standard in advance.These three points are the foundation of agency services,and none shall be missing.

Customs Valuation and Inspection Response for Imported Sealants at Shanghai Port

Customs valuation is always the core link of import agency.In a German brand sealant import case last year,we encountered a situation where the declared price differed by 30% from the data in the General Administration of Customs database.We provided supporting materials including German factory production records and third-party test reports,and the customs finally recognized the reasonable declared price,avoiding the risk of supplementary tax payment.

In specific operations,key attention shall be paid to: ① Whether the transaction price includes hidden costs (such as port operation fee allocation newly added in 2026); ② Deviation between the declared price and the average transaction price of the same goods in the same period (the chemical valuation model released by customs in 2026 has covered 12 sealant sub-categories); ③ Special formulas shall be explained separately (for example,food-grade sealants require additional health quarantine certificates).

Practical Points for Commodity Inspection Pre-review and Animal and Plant Quarantine

Commodity inspection pre-review is the key to avoiding problems after goods arrive at the port.For a batch of Japanese automotive sealants handled last year,we submitted a pre-review application 72 hours before the goods arrived at the port,and found that the declared "construction sealant" was inconsistent with the "automotive interior sealant" marked on the actual packaging label,which requires additional automotive industry certification.We revised the declaration elements in time under this circumstance,avoiding cargo return caused by label inconsistency after arrival at the port.

Regarding animal and plant quarantine,the *Administrative Measures for Quarantine of Imported Plant-derived Materials* newly implemented in 2026 requires: ① Sealants containing natural resin components require fumigation and disinfection certificates; ② Non-wood packaging shall be attached with IPPC mark declaration (to avoid misapplication of the "wood packaging fumigation exemption" clause).A batch of sealants imported from the United States had to supplement the certificate directly at Yangshan Port inspection area due to missing IPPC declaration,resulting in CNY 8,000 of port detention fee.

• Mandatory checklist for commodity inspection pre-review: pre-classification code confirmation letter,MSDS documents (bilingual in Chinese and English),import license (if required)
• Key plant inspection items: additional test reports are required if natural component proportion exceeds 5%
• Special requirements for automotive industry: VDA6.3 certification and vehicle manufacturer access certificate are required

Import License Handling and Special Supervision Requirements

The *Administrative Measures for Import License of Dual-use Items and Technologies* updated by the General Administration of Customs in 2026 clarifies that: ① Construction fire-resistant sealants (such as those containing halogen flame retardants) require separate license application; ② Some sealant brands imported from the EU may involve anti-dumping duties (it is necessary to verify whether the exporting country is on the EU anti-dumping list).

When a European customer imported goods through our agency,the goods were detained at Hamburg Port because they failed to notice the export control on "special function sealants" imposed by a German state.We activated the global agency network collaboration mechanism,completed supplementary declaration with the assistance of our German colleagues,and finally completed release within 3 days.This is the advantage of Shanghai agencies: we can coordinate with overseas branches for rapid response.

Common Risk Warning and Zhongshitong Agency Pitfall Avoidance Solutions

Hidden cost is the most common pitfall in agency services.For example,a customer imported sealants from Southeast Asia,and was charged an extra CNY 12,000 of demurrage by the shipping company because they did not confirm the destination port demurrage clause.Our solutions are: ① Clearly specify "full container delivery,direct port arrival,demurrage liability division" when signing the contract; ② Enable the intelligent logistics system to monitor shipping schedule and terminal status in real time.

Exchange loss risk shall not be ignored either.The exchange rate fluctuation reached 3.2% in 2026,and a customer saved about CNY 28,000 of exchange loss by locking the exchange rate in advance when handling foreign exchange settlement through us.The specific operations are: ① Adopt the combined strategy of "batch settlement + forward foreign exchange settlement and sale"; ② The exchange rate early warning system cooperated with banks pushes fluctuation alerts in real time.

• Common MSDS document errors: failure to mark transportation precautions (such as avoiding mixed transportation with strong oxidants)
• Mandatory declaration element inspection items: brand (such as Dow Corning),model (such as 791),material (silicone/polyurethane)
• Logistics connection key points: hazardous sealants require separate booking,ordinary goods can be declared jointly

Differentiated Advantages of Zhongshitong Agency Services

As a well-established agency serving Shanghai Port,our core advantage lies in three linkages: ① Port linkage: we provide services covering Shanghai Port,Yangshan Port and Waigaoqiao Port,realizing "one declaration,diversion among three ports"; ② Global agency linkage: we have established a data sharing mechanism with agencies at 12 ports in Singapore,Germany,the United States and other countries,updating destination policies in real time; ③ Customs system linkage: we are connected to the customs AEO certification clearance system,and low-risk declarations are processed with priority.

The full process SOP for sealant import newly launched in 2026 has realized full-link visual tracking from "delivery from foreign factories to sign-off by domestic customers".Customers only need to provide basic information (product specifications,brand and model),and we can issue the *Import Compliance Plan* within 48 hours,covering three core contents: HS Code recommendation,risk warning and cost budget.

Imported sealant agency is not simply customs declaration and inspection,but risk prediction and resource integration based on 20 years of front-line experience.Zhongshitong’s value lies in helping customers convert compliance risks into cost advantages: avoiding hidden expenditure with professionalism,shortening customs clearance cycle with efficiency,and ensuring capital security with risk control.If you are looking for an imported sealant agency,you may ask us to issue a free *Compliance Risk Assessment Report* first.