BRAKE FLUID DOT 3 (GLYCOL TYPE) Chemical compatibility with O-rings, rubbers, & plastics

Brake fluid DOT 3, also known as DOT 3 glycol brake fluid or SAE J1703 brake fluid, is a glycol ether-based hydraulic fluid used in automotive braking systems to transmit pressure and ensure reliable stopping performance. As a hygroscopic fluid, DOT 3 brake fluid absorbs moisture over time, which can impact boiling point and system efficiency. When selecting O-rings, rubber seals, and gaskets for exposure to brake fluid DOT 3, compatibility is critical to prevent swelling or degradation. Proper storage and maintenance are essential for safe operation.

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