Greene Tweed Announces New L-Cap™ Seal for Hydraulic Systems in Aerospace Applications

by:Greene Tweed


Easy-to-install rod seal exceeds industry standards for temperature performance and durability

Lansdale, PA – Greene Tweed, a leading global manufacturer of high-performance seals, thermoplastics, composites, and engineered components, announces the release of its new L-Cap™ seal for hydraulic systems in aerospace applications.

Made with proprietary Avalon® PTFE, Arlon® PEEK, and elastomer materials, Greene Tweed’s new L-Cap™ seal exceeds industry standards for performance and durability, ensuring long service life, minimal fluid leakage, and excellent performance across a broad temperature range.

Used in critical flight actuation systems, Greene Tweed’s L-Cap™ seal provides superior fluid sealing in hydraulic cylinders under extremely high pressures. The company’s proprietary Avalon® PTFE, Arlon® PEEK, and elastomer materials ensure high durability and minimal wear over the lifetime of an aircraft. Greene Tweed’s proprietary materials exceed the low-temperature performance requirements set forth by aviation industry standards without sacrificing high-temperature performance.

Greene Tweed’s L-Cap™ seal also delivers unmatched leak prevention, exceeding customer requirements for minimizing hydraulic fluid leakage. In addition, L-Cap™ seals are easier to install than other aviation rod seals, thereby reducing actuation system failures upon initial startup.

Greene Tweed’s durable L-Cap™ seals function well in single- or dual-seal hydraulic cylinders and are designed to mitigate the pressure trap that can occur in dual-seal systems by enabling pressure relief, all without a complicated or costly seal design.

To learn more about Greene Tweed and the new L-Cap™ seals, please visit


About Greene Tweed
Greene Tweed is a leading global manufacturer of high-performance thermoplastics, composites, seals, and engineered components. Combining more than 150 years of technical expertise and commercial knowledge in a variety of markets, Greene Tweed collaborates with customers to develop engineered solutions that meet challenging performance requirements and reduce total cost of ownership.
Greene Tweed products are sold and distributed worldwide. For additional information, call +, or visit our website at

Seema Gangatirkar
Corporate Marketing
Office: +1.281.765.6680
[email protected]