HIGHTEC BRAKE FLUID SUPER DOT 5.1 is a fully synthetic, high-performance brake fluid based on glycols. It is formulated for an especially high dry and wet boiling point, giving maximum vapour-lock resistance for demanding driving. Upgraded oxidation and corrosion inhibitors safeguard the hydraulic circuit.

Purpose and specifications

Suited to hydraulic brake and clutch systems that require a DOT 5.1 glycol fluid, including modern ABS and ESP equipped vehicles. It meets FMVSS 116 DOT 3, FMVSS 116 DOT 4, FMVSS 116 DOT 5.1, SAE J 1703, SAE J 1704, ISO 4925 Class 3, ISO 4925 Class 4, ISO 4925 Class 5.1, JIS K2233 Class 3, JIS K2233 Class 4 and JIS K2233 Class 5.

• 1L container for a complete system bleed and fluid renewal
• Very high dry and wet boiling point for stable braking under repeated hard stops
• Reinforced corrosion and oxidation protection for calipers, cylinders and control units
• Glycol-based and fully mixable with other synthetic DOT 4 and DOT 5.1 fluids

When to use / change?

Use it where a DOT 5.1 grade is prescribed or to upgrade a DOT 4 system that allows it. As a hygroscopic glycol fluid it should be changed about every 2 years irrespective of mileage to keep the boiling point high. It remains stable across the full automotive temperature range and under heavy thermal load. Unopened shelf life is approximately 5 years stored sealed and dry.

Frequently asked questions

What is the advantage of DOT 5.1 over DOT 4?
It offers a higher boiling point and better high-temperature performance while remaining a glycol fluid compatible with DOT 4 systems.

Is DOT 5.1 the same as DOT 5?
No. DOT 5.1 is glycol-based and mixable with DOT 4, whereas DOT 5 is silicone-based and must not be mixed.

How often should it be replaced?
Around every 2 years, since the fluid absorbs moisture that gradually lowers its boiling point.

Suitable for: all passenger cars and motorcycles with hydraulic DOT 4 or DOT 5.1 brake systems. Always verify the exact approval against your vehicle's owner manual before use.