Fumed silica A-200 (a hydrophilic fumed silica with a specific surface area of 200 m²/g ± 25 m²/g) is widely valued in the lubricants industry for its exceptional ability to modify rheology, improve stability, and enhance performance. Its nanoscale particle size (typically 7-40 nm) and high surface area (200 m²/g) make it a versatile additive for addressing various challenges in lubricant and grease formulations.

3. Leakage Prevention and Seal Lubrication
Application: Reinforces grease structure to resist extrusion and leakage.
Example: In automotive wheel bearing greases, 2-4% A-200K is added to lithium complex grease.
Benefits: Reduces leakage by >50% (ASTM D1263 test); Enhances adhesion to metal surfaces.
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