Brake Bleeding Tools & Hydraulic Diagnostics

Why should silicone-based DOT 5 brake fluid NEVER be mixed with glycol-based DOT 3, DOT 4, or DOT 5.1 fluids?

Next

 Correct IncorrectDOT 5 silicone does not mix with glycol; it forms a thick jelly-like sludge that clogs ABS valving, degrades seals, and can lead to brake failure.

Why should silicone-based DOT 5 brake fluid NEVER be mixed with glycol-based DOT 3, DOT 4, or DOT 5.1 fluids?

• Silicone is chemically incompatible with glycol, forming sludge that can clog ABS valving
• DOT 5 turns the brake fluid bright pink
• DOT 5 is conductive and shorts out the battery
• DOT 5 only works in sub-zero Alaska