This Master Cylinder Cap Seal is a vital rubber diaphragm designed to fit Holden WB, and VB, VC, VH, VK Commodore models. Serving as the primary gasket between the master cylinder reservoir and its lid, this seal ensures your brake fluid stays clean and contained while allowing for the natural expansion and contraction of fluid levels during driving.
Key Features:
Flexible Accordion-Style Design: The unique rubber diaphragm features an accordion-like shape that expands and contracts with changes in brake fluid level caused by pad wear or heat, maintaining a consistent seal.
Prevents Vacuum Formation: Allows air to move in and out as fluid levels fluctuate, preventing vacuum build-up that could restrict brake fluid flow and affect braking performance.
Primary Seal for Fluid Containment: Acts as the main gasket between the reservoir and cap, keeping brake fluid free from contamination and moisture ingress.
Durable Rubber Material: Made from high-quality rubber that resists brake fluid corrosion, heat, and ageing to provide long-lasting performance.
If you’re maintaining or restoring a Holden, this Master Cylinder Cap Seal is an essential component to ensure your brake system remains sealed, responsive, and reliable.