Brake fluid dot4

B2B buyers must prioritize the Dry Boiling Point (minimum 230°C) and Wet Boiling Point (minimum 155°C) to ensure the fluid does not vaporize under heavy braking. Additionally, verify the Kinematic Viscosity at -40°C (max 1500 mm²/s) to ensure reliable performance in cold climates. The fluid must be glycol-ether based to remain compatible with standard automotive rubber seals and prevent system corrosion.

The product must strictly adhere to FMVSS No. 116 DOT 4, SAE J1704, and ISO 4925 Class 4. For European markets, ensure the supplier provides REACH and CLP regulation compliance documentation. Always request a Material Safety Data Sheet (MSDS) and a Certificate of Analysis (COA) for every production batch to verify chemical stability.

Ensure the fluid contains high-quality corrosion inhibitors that protect metal components like iron, aluminum, and copper within the braking system. Request pH value test reports (typically between 7.0 and 11.5) to ensure the fluid is not acidic, which would damage the brake lines. Compatibility with SBR and EPDM rubber is essential to prevent seal swelling or shrinkage.

Brake fluid is highly hygroscopic (absorbs moisture), so it must be sealed in hermetic containers with nitrogen flushing if possible. For bulk sourcing, choose high-density polyethylene (HDPE) bottles or tinplate cans with induction-sealed foils. Ensure the packaging includes tamper-evident caps to guarantee product purity upon arrival.

Brake fluid is often classified as Class 9 Miscellaneous Dangerous Goods or non-hazardous depending on the specific formulation and flash point. You must confirm the UN Number and Proper Shipping Name with the supplier. Ensure the supplier provides a Dangerous Goods Declaration and uses UN-certified packaging to avoid customs seizures or carrier rejection at the port of exit.

Focus on Tiered Pricing based on volume; for orders exceeding 5,000 units, aim for a 10-15% discount. Negotiate for OEM/Private Labeling services, ensuring the cost of plate-making and printing is clearly defined. Request a pre-shipment inspection (PSI) by a third party like SGS or Intertek to verify that the chemical composition matches the approved sample before final payment.

Utilize Secured Trading Services provided by Made-in-China.com to ensure funds are only released upon proof of shipment. Always use Letter of Credit (L/C) or Telegraphic Transfer (T/T) with a 30% deposit and 70% balance against the Bill of Lading (B/L). Avoid suppliers who insist on 100% upfront payment via non-traceable methods.

Check your local Customs Tariff Schedule for specific duties on automotive chemicals. Some regions require import licenses for hazardous chemicals. Ensure the supplier provides a Certificate of Origin (CO) to take advantage of any Free Trade Agreements (FTAs) that might reduce import duties for your specific country.