EPDM Brake Cup Seals for Hydraulic Brake Systems
Reliable sealing performance for master cylinder and wheel cylinder applications
Product Overview
We manufacture high-quality EPDM brake cup seals for hydraulic brake systems, including master cylinder and wheel cylinder assemblies. These rubber sealing components are designed for glycol-based brake fluid systems (DOT3, DOT4) requiring stable sealing performance, dimensional accuracy and long-term aging resistance.
Key Features
- Made from high-performance EPDM rubber
- Compatible with DOT3 and DOT4 brake fluid
- Stable sealing under hydraulic pressure
- Good resistance to heat, aging and ozone
- Suitable for brake master cylinder and wheel cylinder
- OEM and custom sizes available
Applications
- Brake Master Cylinder
- Wheel Cylinder
- Hydraulic Brake Systems
- Automotive Brake Repair Kits
- Aftermarket Brake Sealing Components
Technical Specifications
| Parameter | Value |
| Product Name | Brake Cup Seal |
| Material | EPDM |
| Hardness | 70 ± 5 Shore A |
| Color | Black / Custom |
| Temperature Range | -40°C to +120°C |
| Fluid Compatibility | DOT3, DOT4 Brake Fluid |
| Manufacturing Process | Compression Molding / Injection Molding |
Why EPDM for Brake Cup Seals
EPDM (Ethylene Propylene Diene Monomer) is the preferred material for brake cup seals because of its excellent compatibility with glycol-based brake fluids. It offers:
- Outstanding resistance to DOT3 and DOT4 brake fluid
- Excellent ozone and weather resistance
- Good flexibility at low temperatures
- Stable aging performance
- Reliable sealing behavior in hydraulic brake systems
Manufacturing Capability
We support full-process production for brake cup seals, including:
- Rubber compound development
- Mold design and coordination
- Compression molding
- Injection molding
- Trimming and finishing
- Dimensional inspection
- Custom packaging
Quality Control
To ensure reliable brake sealing performance, we maintain strict quality control:
- Raw material verification
- Compound property testing
- Hardness and tensile testing
- Dimensional inspection
- Visual inspection
- Final batch verification
OEM & Custom Brake Cup Seal Service
We support custom development based on your specific requirements:
- Production based on 2D or 3D drawings
- Sample-based development
- Custom size and lip structure
- Hardness adjustment
- Material performance optimization
- Private labeling and custom packaging
Frequently Asked Questions
Need Custom Brake Cup Seals for Your Project?
Send us your drawing, sample or technical requirements. We will respond with a suitable sealing solution and quotation quickly.