“BYD’s audit requires Cl and Br content reports for all raw materials—your COA doesn’t even include this!” Last week, a silicone supplier nearly lost a multi-million-yuan battery sealant order because it couldn’t provide halogen data on time. Similar cases are surging: CATL, Sunwoda, SVOLT, and other top battery makers now mandate “halogen-free” as a hard entry requirement, specifying Cl < 900 ppm and Br < 900 ppm in all materials.
Many traders still operate under the misconception: “Silicones are organosilicon—they’re naturally halogen-free.” But in reality, halogens can enter via emulsifiers, antioxidants, or even residual catalysts/solvents. For example, chlorosilane byproducts, brominated flame retardant synergists, or halogenated solvent residues can easily push final product Cl/Br levels above limits.
“It’s not that the material itself contains halogens—it’s poor supply chain control,” admitted a battery materials engineer. “We once found a ‘high-purity silicone’ with Cl at 1500 ppm—the source was recycled solvent contaminated with chlorinated hydrocarbons.”
To meet automotive-grade demands, we’ve upgraded our quality system:
✅ All silicones produced without halogenated additives or solvents;
✅ Every batch tested via ICP-MS (Inductively Coupled Plasma Mass Spectrometry);
✅ COAs explicitly state Cl/Br values (in ppm) and declare compliance with IEC 61249-2-21 and battery OEM specs;
✅ Support third-party SGS/CTI halogen-free certification reports for BYD, CATL, and others.
Our halogen-free silicones are already used in EV battery thermal interface materials, cell encapsulants, and module cushioning pads—with customers reporting “first-time audit pass, zero supplemental documents.”
In the new energy supply chain, compliance isn’t a bonus—it’s your ticket to play.
Don’t let a missing halogen report become the reason you lose your biggest customer.
Request our Automotive-Grade Halogen-Free Silicone Compliance Package (including ICP-MS templates, declarations, and supply chain controls) to breeze through Tier 1 battery audits and secure high-value orders.
