LANSDALE, PA, Feb 25, 2026 – Greene Tweed has developed and deployed its Metal-Spring-Energized (MSE) seals for the McLaren Mastercard Formula 1 (F1) Team’s limited-slip differential clutch pack. The deployment expands the partnership between Greene Tweed and McLaren Racing and focuses on sealing technology for motorsports applications.
As the reigning F1 Constructors’ Champions, McLaren recognizes incremental gains across individual components. The team selected Greene Tweed to provide a sealing solution for the hydraulic actuator that clamps the friction clutch inside the differential. The actuator controls torque distribution to support traction and cornering speed. Leakage would result in loss of hydraulic function and force the car to retire.
“This project was a true example of collaborative engineering at its best,” said Matthew James, director of engineering and product design at Greene Tweed. “Our teams worked side-by-side to validate seal behavior under real operating conditions, refining the design through testing and iteration. The result is a robust, leak-free sealing solution that supports McLaren’s pursuit of marginal gains while meeting the long-term demands of Formula 1 racing.”
The MSE seal assemblies feature a C-shaped profile paired with a corrosion-resistant metal spring to maintain consistent sealing force. Greene Tweed designed the MSE seals to operate at temperatures up to 150°C (302°F) and pressures from 5 to 250 bar (72.5–3,625 psi), with exposure to fluids. The assemblies use Greene Tweed’s Avalon 44 (PTFE), which provides wear resistance, strength, and low friction. The material is used in motorsports, aerospace, semiconductor manufacturing, and energy applications.
“Given Greene Tweed’s longstanding reputation for excellent quality, choosing them was an obvious choice for us,” said James Manning, head of transmission at McLaren Mastercard Formula 1 Team. “The MSE Seal has consistently demonstrated its durability and reliability within our system. We’re confident this is only the beginning of a long-term collaboration to drive even greater performance in future seasons.”
Source: Greene Tweed
About Greene Tweed
Greene Tweed designs and manufactures engineered materials, components, seals, and electrical connectors for industrial applications. The company serves customers in energy, aerospace, semiconductor, chemical processing, life sciences, defense, and related industrial markets. Its products include thermoplastics, elastomers, composites, sealing systems, structural components, and electrical connectors. These products are used in operating conditions involving high pressure, extreme temperatures, and chemically aggressive environments. Founded in 1863, Greene Tweed has developed from a distributor into a global manufacturer. The company supplies components for aircraft systems, energy infrastructure, semiconductor manufacturing equipment, and industrial processing operations. Customers include oil and gas producers, aerospace manufacturers, chip fabrication companies, and pharmaceutical processors. Greene Tweed reports approx. 3,000 customers worldwide across more than 100 countries. It employs about 1000 people globally. The company operates manufacturing and engineering facilities in North America, Europe, and Asia. Greene Tweed is headquartered in Lansdale, PA.
About Mclaren Racing
McLaren Racing is a British motor racing team that competes in Formula One and other series. The team designs, builds, and races open-wheel cars for professional motorsports competition. McLaren Racing was founded in 1963 by Bruce McLaren. It is headquartered at the McLaren Technology Centre in England, United Kingdom. The organization manages car design, engineering development, and track operations. It also oversees race strategy and performance analysis. McLaren Racing operates the McLaren Mastercard Formula 1 Team and competes in additional series, including IndyCar. The team works with drivers, engineers, technical staff, sponsors, and governing bodies within the motorsports industry.