Product Features: - Maintains braking performance for a longer duration thanks to its higher boiling point and the ability to sustain this high boiling point under intense operating conditions. This significantly reduces the formation of vapor lock at high temperatures, ensuring superior and longer-lasting braking performance. - Offers more comprehensive protection for metal surfaces—its specially formulated buffer additives keep the pH value within the alkaline range. Advanced additive technology provides all-around corrosion protection for metals such as aluminum, brass, copper, zinc, and tin, reducing leakage and pressure loss. - Features an optimized sealing expansion rate that effectively minimizes leakage caused by seal shrinkage and wear of moving parts due to excessive seal expansion. - Enhances both operational performance and service life. Outstanding thermal stability and oxidation resistance effectively prevent brake fluid degradation and the formation of harmful deposits, ensuring reliable overall fluid life and critical performance. - Possesses excellent cleaning capabilities, efficiently removing residual moisture, oil sludge, and impurities from brake lines, thereby extending the lifespan of the braking system and restoring braking performance to its original condition. Application Scope: Widely suitable for various conventional hydraulic braking and clutch systems, especially in harsh working conditions or where DOT4 brake fluids are recommended. Compared to lower-performance brake fluids, this product offers enhanced protection against “air lock,” providing greater safety. It is ideal for hydraulic braking systems (disc or drum brakes) in power vehicles requiring DOT4 or SAE J1704 specification brake fluids. Product Name: DOT-4 Brake Fluid Production Batch Number: [Not provided] Executive Standard: GB12981-2012 Production Quantity/Serial Number: [Not provided] Inspection Items and Measured Values: 1. Appearance: Clear and transparent, free from suspended particles, impurities, and sediment—Pass 2. Equilibrium Reflux Boiling Point (ERBP) (°C): ≥230—249 3. Wet Equilibrium Reflux Boiling Point (WERBP) (°C): ≥155—162 4. Kinematic Viscosity (mm²/s): - At -40°C: ≤1500—1423 - At 100°C: ≥1.5—2.15 5. pH Value: 7.0 ~ 11.5—8.5 6. Corrosivity: - After 120 hours ±2 hours at 100°C ±2°C: - Tin-plated iron sheet: No visible pitting or surface roughness; discoloration or staining allowed—Pass - Steel: No visible pitting or surface roughness; discoloration or staining allowed—Pass - Cast iron: No visible pitting or surface roughness; slight weight change allowed—Pass - Aluminum: No visible pitting or surface roughness; slight weight increase allowed—Pass - Brass: No visible pitting or surface roughness; slight weight decrease allowed—Pass - Copper: No visible pitting or surface roughness; slight weight increase allowed—Pass - Zinc: No visible pitting or surface roughness; slight weight increase allowed—Pass 7. Rubber Sealing Condition: - Appearance: Surface not sticky, no carbon black precipitation—Pass - Hardness Reduction: ≤15—4 - Root Diameter Increase (mm): ≤1.4—0.41 - Volume Increase (%): ≤16—4.4 8. Post-Test Fluid Performance: - Appearance: No gel formation, no adhesion to metal surfaces—Pass - Sediment Content (Volume Fraction, %): ≤0.1—0.00 - pH Value: 7.0~11.5—8.397 9. Rubber Compatibility: - At 120°C ±2°C for 70 hours ±2 hours: - Styrene-butadiene rubber (SBR) sealing element: - Appearance: Not sticky, no blistering, no carbon black precipitation—Pass - Root Diameter Increase (mm): 0.15 ~ 1.4—0.65 - Hardness Reduction (IRHD): ≤15—5 - Ethylene propylene diene monomer (EPDM) sealing element: - Appearance: Not sticky, no blistering, no carbon black precipitation—Pass - Volume Increase (%): 0 ~ 10—4.35 - Hardness Reduction (IRHD): ≤15—3.0 10. Evaporation Performance: - At 100°C ±2°C for 168 hours ±2 hours: - Evaporation Loss (%): ≤80—67.5 - Residue Properties: When rubbed with fingertips, residue contains no granular sand particles or abrasive materials—Pass - Pour Point (°C): Not higher than -5—< -5 Verification Conclusion: Pass