Johnsen's DOT-4 Brake Fluid 1 Gallon — Premium Synthetic, High Boiling Point

Johnsen's 5034 is a premium synthetic DOT-4 brake fluid formulated to protect disc, drum and ABS systems while minimizing vapor lock and moisture-related performance loss.

Whether you're maintaining a daily driver, servicing a fleet, or preparing a performance car for track days, choosing the right brake fluid matters. Johnsen's 5034 is engineered to meet and exceed DOT 3 and DOT 4 specifications, giving technicians and vehicle owners a high-quality synthetic option that balances boiling resistance, moisture control, and system compatibility.

How does Johnsen's 5034 help braking performance under heavy use?

This synthetic DOT-4 fluid is formulated to resist vapor formation and sustain hydraulic pressure at elevated temperatures, which helps maintain consistent pedal feel during repeated or heavy braking. It also includes additives designed to reduce moisture absorption and the associated drop in boiling point over time.

• High dry and wet boiling points for improved performance under load
• Additives to reduce vapor lock risk
• Synthetic base for stable viscosity and predictable feel

Is Johnsen's 5034 compatible with my vehicle's brake system?

Johnsen's 5034 is suitable for use in disc, drum and ABS-equipped braking systems and meets the chemical and boiling-point requirements of DOT 3 and DOT 4 fluids. It is designed to work with common seals and materials used in modern brake systems, but consult your owner's manual if your vehicle specifies a different fluid type.

• Meets/exceeds DOT 3 and DOT 4 industry standards
• Compatible with most ABS systems and standard brake materials
• Recommended to follow manufacturer-specified fluid type when indicated

How should I use and store this 1-gallon container safely?

Use standard brake-system service procedures: drain, flush, and refill according to vehicle or fleet maintenance intervals, and bleed the system to remove air. Store the sealed container in a cool, dry place away from direct sunlight and contamination; tightly reseal after partial use to limit moisture uptake.

• Follow proper disposal and local regulations for used brake fluid
• Close cap securely to minimize moisture absorption
• Keep away from ignition sources and out of reach of children

What maintenance benefits can I expect from choosing this product?

Using Johnsen's 5034 helps maintain reliable hydraulic response and reduces the frequency of fluid-related performance issues. Over time it supports consistent pedal feel and helps protect internal components from moisture-induced corrosion and vapor-related fade.

• Longer-lasting, stable braking response
• Protects against moisture-related degradation
• Helps prevent vapor lock and brake fade during repeated stops

Who is this for: Johnsen's 5034 Premium Synthetic DOT-4 Brake Fluid in the 1-gallon size is aimed at professional mechanics, fleet maintenance teams, and DIY enthusiasts who perform routine brake service or need a reliable fluid for high-demand driving. It's a practical choice when you want a DOT-4 performance level with synthetic formulation and the convenience of a one-gallon container for multiple services or larger vehicles.