Seiken rubber grease (notably CF301) is a high-quality, Japan-made synthetic lubricant designed for automotive brake systems, specifically for rubber components like seals, pistons, and O-rings. It is designed to be compatible with rubber, preventing degradation, while providing excellent water resistance and heat resistance to prevent rust and corrosion.
Key Specifications and Features:
- Part Number: CF301 (100g tube)
- Purpose: Lubricates rubber parts (piston cups, brake cylinders, boots, seals) and aids assembly
- Performance: Prevents initial leakage, abnormal piston wear, and protects against rust/oxidation
- Compatibility: Safe for all rubber parts
- Origin: Made in Japan
For high-temperature brake pad shim lubrication, Seiken also offers a specific disc pad grease (CF305), which operates from -30°C to 1000°C.



