Liqui Moly Brake Fluid DOT 4 500 ml — synthetic brake fluid with high wet and dry boiling points

Liqui Moly Brake Fluid DOT 4 is a synthetic, high-performance brake fluid formulated to keep hydraulic braking systems responsive under high temperatures and wet conditions.

Engineered from a blend of glycol ethers, alkyl polyglycols and glycol ether esters, this DOT 4 fluid delivers elevated wet and dry boiling points while protecting metallic components from corrosion and oxidation. Special scavenger additives reduce the risk of steam formation as moisture accumulates, helping maintain consistent pedal feel and safety margins over time. Packaged in a 500 ml bottle (SKU: 20154), it’s designed for topping up or servicing passenger cars, light commercial vehicles and electric vehicles requiring DOT 4 specification fluids.

How does this DOT 4 fluid perform under heat?

High dry and wet boiling points are central to preserving braking performance during spirited driving, towing or prolonged stopping. Liqui Moly’s formulation resists vaporisation at elevated temperatures so the hydraulic system retains pressure and responsiveness.

• Elevated dry boiling point reduces vapour lock risk during sustained heavy braking.
• High wet boiling point maintains performance after moisture uptake.
• Synthetic base fluids retain viscosity stability across temperature swings.

What protection does it provide for brake components?

This brake fluid contains inhibitors to slow corrosion and antioxidant agents to limit fluid breakdown at high temperatures. That preserves metal parts, seals and the fluid’s functional life between service intervals without relying on aggressive additives that can harm system materials.

• Corrosion inhibitors guard calipers, lines and master cylinders.
• Oxidation control helps prevent sludge and deposit formation.
• Compatible with typical elastomers and seals used in hydraulic systems.

How does moisture affect this brake fluid and what reduces that impact?

Absorbing moisture is inevitable for glycol-based brake fluids, but Liqui Moly includes scavengers that dampen steam bubble formation when water content rises. The result is a safer pedal feel for longer and a more predictable braking response until a scheduled fluid change.

• Moisture scavengers lower cavitation and vapour bubble risk.
• High wet boiling point provides continued safety after some moisture absorption.
• Regular maintenance intervals still recommended for optimal safety.

Is this DOT 4 suitable for modern and electric vehicles?

Yes — the product is formulated to meet DOT 4 performance standards and is suitable for conventional petrol/diesel vehicles and many electric vehicle hydraulic systems that specify DOT 4. Always confirm the vehicle manufacturer’s recommended fluid spec before use.

• Meets DOT 4 performance characteristics for compatibility.
• Appropriate for a wide range of passenger cars and light commercial vehicles.
• 500 ml bottle size handy for top-ups and routine maintenance.

Who is this for: Technicians, DIY mechanics and fleet managers seeking a dependable DOT 4 brake fluid that balances high-temperature stability with corrosion protection. Ideal when you need a synthetic DOT 4 fluid in a convenient 500 ml container for topping up or completing a brake service, especially on vehicles that experience heavy use, towing, or operate in varied climates.