Bosch Superfit Brake Lubricant: A Comprehensive Guide

When it comes to maintaining the efficiency and longevity of your vehicle's braking system, the right lubrication plays a pivotal role. Among the array of specialised lubricants available, Bosch Superfit brake lubricant stands out for its effectiveness and reliability. This article delves into the world of Bosch Superfit, exploring its primary uses, the benefits it offers, and a detailed guide on its application, drawing upon expert advice from Bosch itself. Understanding how to properly use this product can significantly contribute to a quieter, smoother, and ultimately safer braking experience.

What is Bosch Superfit Brake Lubricant?

Bosch Superfit is a high-performance, synthetic brake lubricant specifically formulated to reduce friction and prevent seizing between critical brake components. Its unique composition is designed to withstand the extreme temperatures and pressures encountered within a braking system, ensuring consistent performance even under demanding conditions. It's not just about lubrication; it's about ensuring the proper functioning of your brakes.

Primary Uses of Bosch Superfit

The primary function of Bosch Superfit brake lubricant is to lubricate the contact points within the brake assembly where metal-on-metal or metal-on-rubber contact occurs. This typically includes:

• Brake Pad Mounting Points: Lubricating the lugs (or ears) of the brake pads where they interface with the brake caliper bracket. This prevents sticking and ensures the pads can move freely.
• Caliper Guide Pins/Pillars: Ensuring the smooth sliding action of the caliper over its guide pins is essential for even brake pad wear and consistent braking force.
• Back of Brake Pads: A small application to the centre of the backing plate of the brake pad (where it contacts the caliper piston) or to the anti-squeal shim can help eliminate brake noise and vibration.
• Contact Surfaces: In some applications, it can be used on other contact surfaces within the braking system to prevent corrosion and ensure smooth operation.

Why Use a Dedicated Brake Lubricant like Bosch Superfit?

While it might be tempting to use general-purpose grease, dedicated brake lubricants like Bosch Superfit offer distinct advantages:

Key Benefits:

• Temperature Resistance: Brakes generate significant heat. Superfit is formulated to maintain its lubricating properties across a wide temperature range, from extreme cold to the high temperatures generated during braking.
• Compatibility: It is specifically designed to be compatible with rubber and plastic components within the brake system, such as dust seals and boots, preventing swelling or degradation. General greases can often damage these critical rubber parts.
• Corrosion Prevention: Protects metal components from rust and corrosion, which can impede movement and lead to premature wear.
• Noise Reduction: A primary benefit is the reduction or elimination of brake squeal and judder by damping vibrations between the pad, caliper, and rotor.
• Smooth Operation: Ensures that caliper guide pins slide freely, allowing the brake pads to retract fully when the brake pedal is released. This prevents drag and premature wear.
• Longevity: By reducing friction and preventing wear, it helps to extend the life of brake pads, discs, and calipers.

When to Apply Bosch Superfit Brake Lubricant

The most common and critical time to apply Bosch Superfit is during the replacement of brake pads. It is also highly recommended whenever the brake caliper is removed or serviced, particularly when cleaning or lubricating the caliper guide pins.

How to Apply Bosch Superfit Brake Lubricant (Expert Steps)

Following the precise steps for application is crucial for reaping the full benefits of Superfit. Bosch provides clear guidance:

After removing the old brake pads, follow these steps:

1. Clean the Clevis: Use a wire brush to thoroughly clean the mounting points or 'clevis' where the brake pads sit within the caliper bracket. Remove any rust, dirt, or old grease. A clean surface ensures good adhesion and proper movement.
2. Check Caliper Pillar Smoothness: Ensure the brake caliper pillars (also known as guide pins or slider pins) slide smoothly within their rubber boots. If they are stiff or seized, they need to be cleaned, lubricated with an appropriate lubricant (often a silicone-based rubber grease is recommended for the pins themselves, separate from Superfit's application on pad contact points), and their rubber boots inspected for damage. Smooth sliding is paramount.
3. Lubricate Pad Lugs: Apply a thin, even layer of Bosch Superfit to the lugs (ears) of the new brake pads. Also, apply a small amount to their seating points on the caliper bracket (the clevis). This ensures the pads can move freely within the bracket.
4. Apply to Pad Back/Noise Barrier (If Necessary): If you are experiencing or want to prevent brake noise, apply a small dab of Superfit to the centre of the back of the brake pad (the metal backing plate) or to the noise barrier/anti-squeal shim. Crucially, only apply this to the side opposite the caliper piston. Applying it directly to the piston side can lead to excess lubricant being pushed into the system or affecting the piston seal.

Important Considerations:

• Less is More: Avoid over-applying the lubricant. A thin, even layer is sufficient. Too much grease can attract dirt and debris, and potentially contaminate the brake disc or pads, reducing braking effectiveness.
• Avoid Disc and Pad Friction Surfaces: Never allow any lubricant, including Superfit, to come into contact with the friction material of the brake pad or the surface of the brake disc. This will severely compromise braking performance and could be dangerous.
• Vehicle Manufacturer Recommendations: Always consult your vehicle manufacturer's service manual for specific lubrication points and recommended products. While Superfit is versatile, some manufacturers may have unique requirements.
• Quality Matters: Demand Bosch quality for your braking system components. Using reputable products ensures safety and performance.

Bosch Superfit vs. Other Lubricants

It's important to distinguish Superfit from other types of lubricants used in automotive applications:

Bosch Superfit is specifically engineered for the critical contact points of the brake pads and caliper bracket, focusing on anti-seize and anti-noise properties, while remaining compatible with brake system materials. It is not a substitute for silicone grease needed for rubber caliper seals and boots.

Frequently Asked Questions (FAQs)

Q1: Can I use Bosch Superfit on the brake disc?

A: No, absolutely not. Lubricants should never come into contact with the friction surface of the brake disc or the brake pad material. This will severely impair braking performance.

Q2: Is Bosch Superfit suitable for lubricating caliper guide pins?

A: While Superfit lubricates metal-to-metal contact points, it is generally recommended to use a dedicated silicone-based brake lubricant specifically designed for rubber caliper guide pin boots and seals. Superfit is primarily for the pad mounting points and backs.

Q3: How often should I reapply brake lubricant?

A: Brake lubricant is typically applied during brake pad replacement. It is a long-lasting product designed to withstand the life of the brake pads. Reapplication is only necessary when brake pads or other caliper components are serviced.

Q4: Will Bosch Superfit stop my brakes from squealing?

A: Yes, in many cases. By lubricating the pad lugs and the back of the pad/shim, Superfit helps to dampen vibrations that cause squeal. However, brake squeal can have multiple causes, and lubricant is just one solution.

Q5: How much Bosch Superfit should I use?

A: A thin, even coating is sufficient. Over-application can lead to unintended consequences like attracting dirt or migrating to friction surfaces. Ensure the areas are lightly coated.

Conclusion

Bosch Superfit brake lubricant is an essential product for any vehicle owner or mechanic focused on maintaining a healthy and responsive braking system. By understanding its specific applications and adhering to correct application procedures, you can significantly enhance braking performance, reduce noise, and contribute to the overall longevity of your brake components. Always prioritise quality and follow manufacturer guidelines to ensure the utmost safety on the road.