We help solve application challenges, answer material questions, and provide valuable technical advice. Have a question? Ask a Plastics Expert. Want to explore more resources? Check out our articles, material selection tools, and videos. DuPont™ Vespel® Polyimides - High Performance Polymers for Aerospace Valve Seats and Seals Download White Paper Design Considerations for the Use of Plastic Materials in Cryogenic Environments Download White Paper Performance Advantages of VICTREX® PEEK™ (polyetheretherketone) Download White Paper Plastic Diffuser Solutions for LED Lighting Download White Paper High Performance Retail Store Fixtures Made from KYDEX® Thermoplastic Sheet Download Material Guide