Antidumping tariff fiberglass 2026: key corrections for importers

Key data

European importers of continuous filament fiberglass (GFR) from Bahrain, Egypt and Thailand must review their operations following the publication of Implementing Regulation (EU) 2026/1371, which corrects material errors in Regulation (EU) 2026/831. The latter established definitive antidumping duties on these products; the correction published on 24 June 2026 does not alter the tariff rates, but may affect the product codes, descriptions or calculation data applicable to each operator.

For European GFR manufacturers, protection against imports at dumping prices remains intact. For importers and industrial sectors using this raw material, the key is to confirm that their customs declarations remain correct in light of the technical corrections introduced.

What does this regulation establish?

Regulation (EU) 2026/831 established definitive antidumping duties on imports of continuous filament fiberglass products (GFR) originating from Bahrain, Egypt and Thailand. These duties protect European manufacturers against imports sold below the cost of production (dumping).

Regulation (EU) 2026/1371 detects and corrects material errors in that original text. According to the regulation, the corrections are technical in nature and do not modify:

• The substance of the antidumping measure
• The duty rates applicable to each company or country

What may have changed are elements such as:

• Product codes or NC codes associated with GFR
• Technical descriptions of products subject to the tariff
• Calculation data used to determine dumping margins

The corrected standard (Regulation (EU) 2026/831) remains the main reference for duty rates. Regulation 2026/1371 acts as an official errata with binding legal effect.

Economic and operational impact

Although the corrections are technical, their operational impact can be significant for importers. An incorrect tariff classification—based on the original text with errors—can result in:

• Additional settlements if an incorrect code has been applied that underestimated the antidumping duty
• Claims or refunds if a higher duty has been applied due to an error in the product description
• Customs delays if declarations are not updated with the corrected codes or descriptions

For European GFR manufacturers, the antidumping measure remains in force and protects their competitiveness against imports from Bahrain, Egypt and Thailand. There is no change in the tariff protection they receive.

For industrial sectors using GFR as raw material—construction, automotive, composite materials—the cost of imports does not vary in terms of duty rate, but they must ensure that their suppliers and customs agents work with the corrected text and not the original.

Who does it affect?

• European GFR importers from Bahrain, Egypt or Thailand: must verify whether the codes or descriptions of their products have been corrected.
• Manufacturers using GFR as raw material in sectors such as construction, automotive and composite materials: must review their supply chains and cost impact.
• Customs agents and logistics operators managing import declarations for these products: must update their references to the corrected text.
• European GFR manufacturers: benefit from antidumping protection, which remains unchanged in its rates.
• Purchasing departments and CFOs of industrial companies that have Bahrain, Egypt or Thailand as the origin of fiberglass supply.

Practical example

A Spanish composite materials company regularly imports GFR from Egypt. Its customs declarations are based on the codes and descriptions of the original Regulation (EU) 2026/831.

Following the publication of Regulation (EU) 2026/1371, the company's customs agent must check whether any of the NC codes or product descriptions it regularly uses has been subject to correction. If the code used in recent declarations corresponds to one of the corrected elements, the company must:

1. Update its internal references and instructions to its customs agent with the corrected text.
2. Review whether declarations submitted since the entry into force of Regulation 2026/831 should be subject to rectification with customs.
3. Confirm with its advisor that the antidumping duty rate applied remains correct, given that the rates have not changed.

If the company's product code is not among those corrected, no immediate action is necessary beyond verification.

What should companies do now?

1. Download and review the text of Regulation (EU) 2026/1371 to identify exactly which product codes, descriptions or calculation data have been corrected compared to Regulation (EU) 2026/831.
2. Compare the NC codes and descriptions used in current customs declarations with the corrected elements to detect any discrepancies.
3. Inform the customs agent of the correction and ensure that future import declarations for GFR from Bahrain, Egypt or Thailand are based on the corrected text.
4. Assess whether it is necessary to rectify previous declarations submitted since the entry into force of Regulation 2026/831, in coordination with the customs advisor.
5. Review the supply chain and contracts with suppliers from these three countries to anticipate any cost impact from a reclassification.
6. Document internally the review carried out as evidence of due diligence in the event of a customs inspection.

Official source

Consult complete regulation in official source

Notice: This article is for informational purposes only and does not constitute legal advice. For specific decisions, consult a qualified professional. Source: https://eur-lex.europa.eu/./legal-content/AUTO/?uri=OJ:L_202601371