Automotive Engine Seals

KOK designs and supplies automotive engine seals for both OEM and aftermarket applications, supporting a wide range of engine architectures, operating conditions, and production requirements.

KOK engine seals are used in critical sealing locations within internal combustion engines, where resistance to heat, oil, pressure, and long-term mechanical stress is essential to reliable engine operation.

Contents

• Material Options
• OEM Automotive Engine Seals
• Aftermarket Automotive Engine Seals
• Program Support

Material Options

KOK automotive engine seals are available in multiple elastomer compounds selected according to application, temperature range, and media exposure, including:

• NBR / HNBR (Nitrile Rubber): Oil resistance and durability for standard and high-performance engine environments.
• ACM (Polyacrylic Rubber): Heat resistance for elevated-temperature engine applications.
• FKM (Fluoroelastomer): High-temperature and aggressive media resistance.
• VMQ (Silicone Rubber): Flexibility and low-temperature performance.

Material selection is aligned with customer specifications and intended operating conditions.

OEM Automotive Engine Seals

KOK supplies automotive engine seals to OEM customers primarily based on customer-provided drawings and specifications, supporting series production programs with defined material, dimensional, and validation requirements.

KOK’s role in OEM engine seal programs includes:

• Compound selection and material validation
• Tooling coordination and production readiness
• Dimensional inspection and quality control
• Stable, repeatable series supply

This approach allows OEM customers to maintain design authority while leveraging KOK’s long-standing expertise in elastomer formulation, sealing performance, and production control.

Aftermarket Automotive Engine Seals

KOK maintains a broad and mature aftermarket engine seal portfolio, developed and supplied for over three decades and covering a wide range of passenger cars, trucks, and buses in global markets.

The aftermarket range includes:

• Extensive coverage of popular engine platforms
• Seals manufactured to meet or exceed OE dimensional and material expectations
• Products distributed internationally under multiple long-established trademarks

This depth of coverage allows aftermarket partners to source consistent, reliable engine seals across multiple vehicle applications from a single supplier.

Program Support

Whether supporting OEM production programs or high-volume aftermarket distribution, KOK works closely with customers to align material choice, quality requirements, and supply expectations with their specific application needs.