EU REACH Supplementary Regulation Tightens D4/D5 Limits, Silicone Exporters Accelerate Formula Upgrading

Key Sentence: The newly issued supplementary REACH rule lowers the limit of D4 and D5 in silicone sealants to 0.1%, forcing manufacturers to phase out traditional high-volatility formulas before October. On July 12, 2026, the European Commission officially issued Regulation (EU) 2026/1389 to supplement Appendix XVII of REACH, imposing stricter detection standards on construction, new energy and electronic silicone sealants exported to Europe. All batches must provide third-party test reports to prove low cyclic siloxane content, otherwise goods will be detained and returned. Numerous domestic silicone sealant enterprises have finished raw material replacement and launched zero-D4 low-odor silicone series to meet new standards. Ordinary general silicone products will lose EU market access once the regulation takes effect. Relevant export associations remind factories to complete sample testing and compliance documents as soon as possible to avoid large order losses in Q4, and low-volatile environmentally friendly silicone will become the mainstream export product for the European market.